Difference between revisions of "Scilab/C4/Calling-User-Defined-Functions-in-XCOS/English-timed"
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{| Border=1 | {| Border=1 | ||
| − | | | + | |'''Time''' |
| − | + | ||
| − | + | ||
| + | |'''Narration''' | ||
|- | |- | ||
| − | | 00 | + | | 00:01 |
| − | | Welcome to the spoken tutorial on ''' | + | | Welcome to the spoken tutorial on '''Calling user-defined functions in Xcos'''. |
|- | |- | ||
| − | | 00 | + | | 00:07 |
| − | | In this tutorial we will learn | + | | In this tutorial we will learn: |
|- | |- | ||
| − | |00 | + | |00:09 |
| − | |To write a squaring function in '''Scilab''' | + | |* To write a squaring function in '''Scilab''' |
| − | + | ||
|- | |- | ||
| − | |00 | + | |00:12 |
| − | |To use the ''' scifunc''' block in ''' Xcos''' | + | |* To use the '''scifunc''' block in ''' Xcos''' |
| − | + | ||
|- | |- | ||
| − | | 00 | + | | 00:15 |
| − | | To use MUX block to draw multiple plots | + | |* To use MUX block to draw multiple plots |
|- | |- | ||
| − | |00 | + | |00:19 |
| − | |To call functions having multiple inputs and outputs | + | |* To call functions having multiple inputs and outputs. |
|- | |- | ||
| − | | 00 | + | | 00:24 |
| − | |''' Ubuntu''' 12.04 is the ''' operating system''' used with '''Scilab version 5.3.3 | + | |''' Ubuntu''' 12.04 is the '''operating system''' used with '''Scilab version 5.3.3''' installed. |
|- | |- | ||
| − | | 00 | + | | 00:32 |
| − | | You should have | + | | You should have basic knowledge of '''Scilab''', |
| − | + | ||
|- | |- | ||
| − | |00 | + | |00:35 |
| − | | | + | |basic knowledge of ''' Xcos'''. |
|- | |- | ||
| − | | 00 | + | | 00:38 |
| − | | If not, for relevant tutorials please visit ''' spoken hyphen tutorial dot org''' | + | | If not, for relevant tutorials, please visit '''spoken hyphen tutorial dot org'''. |
|- | |- | ||
| − | | 00 | + | | 00:44 |
| − | | Start ''' Scilab''' on your computer. | + | | Start '''Scilab''' on your computer. |
|- | |- | ||
| − | |00 | + | |00:47 |
| − | |In the ''' Scilab''' console, type ''' editor''' and press ''' Enter''' | + | |In the '''Scilab''' console, type ''' editor''' and press '''Enter'''. |
| − | + | ||
| − | + | ||
|- | |- | ||
| − | |00 | + | |00:53 |
| − | |Then type the following code | + | |Then type the following code: |
|- | |- | ||
| − | |00 | + | |00:55 |
| − | | | + | |'''function space y is equal to squareit open bracket a close bracket'''. |
|- | |- | ||
| − | |01 | + | |01:07 |
| − | |Press the | + | |Press the '''Enter''' key and type: |
|- | |- | ||
| − | |01 | + | |01:10 |
| − | |''' y''' is equal to '''a''' raise to 2 | + | |'''y''' is equal to '''a''' raise to 2 |
| − | + | ||
|- | |- | ||
| − | | 01 | + | | 01:14 |
| − | + | ||
| − | + | ||
| + | |put a semicolon in the end. | ||
|- | |- | ||
| − | | 01 | + | | 01:17 |
| − | |The function has one input variable ''' a''' and one output variable ''' y ''' | + | |The function has one input variable ''' a''' and one output variable '''y'''. |
|- | |- | ||
| − | |01 | + | |01:24 |
| − | + | ||
| − | + | ||
| + | |The name of the function is '''squareit'''. | ||
|- | |- | ||
| − | |01 | + | |01:27 |
| − | |This function will do the job of squaring the variable ''' a.''' | + | |This function will do the job of squaring the variable '''a.''' |
|- | |- | ||
| − | |01 | + | |01:31 |
| − | + | ||
| − | + | ||
| + | |It will store the result in '''y.''' | ||
|- | |- | ||
| − | |01 | + | |01:34 |
|Let us save this file in the desired directory. | |Let us save this file in the desired directory. | ||
| − | |||
| − | |||
|- | |- | ||
| − | |01 | + | |01:38 |
| − | |I will save this file with file name ''' squareit''' and extension ''' .sci ''' | + | |I will save this file with file name ''' squareit''' and extension '''.sci'''. |
|- | |- | ||
| − | | 01 | + | | 01:44 |
|Here we are following the convention of saving functions in '''.sci''' format. | |Here we are following the convention of saving functions in '''.sci''' format. | ||
|- | |- | ||
| − | |01 | + | |01:50 |
| − | |Switch to the ''' Scilab''' console | + | |Switch to the '''Scilab''' console. |
|- | |- | ||
| − | |01 | + | |01:53 |
| − | | Now, type ''' Xcos''' and press '''Enter.''' | + | | Now, type '''Xcos''' and press '''Enter.''' |
|- | |- | ||
| − | |01 | + | |01:57 |
| − | |Two windows will open | + | |Two windows will open, |
|- | |- | ||
| − | | 01 | + | | 01:59 |
| − | + | ||
| − | + | ||
| + | |a '''Palette browser''' and an '''Untitled Xcos''' window. | ||
|- | |- | ||
| − | | 02 | + | | 02:04 |
| − | |Now we will make the ''' Xcos''' diagram. | + | |Now we will make the '''Xcos''' diagram. |
| − | + | ||
|- | |- | ||
| − | |02 | + | |02:06 |
| This will access the function '''squareit''' created just now. | | This will access the function '''squareit''' created just now. | ||
| − | |||
|- | |- | ||
| − | |02 | + | |02:10 |
| This can be done by using '''scifunc''' block. | | This can be done by using '''scifunc''' block. | ||
| − | |||
|- | |- | ||
| − | | 02 | + | | 02:14 |
| − | |Switch to the ''' | + | |Switch to the '''Palette browser''' window. |
|- | |- | ||
| − | | 02 | + | | 02:17 |
|Click on the ''' User-Defined''' function in the pallet browser. | |Click on the ''' User-Defined''' function in the pallet browser. | ||
| − | |||
| − | |||
|- | |- | ||
| − | | 02 | + | | 02:21 |
|Locate the block '''scifunc_block_m''' in this section. | |Locate the block '''scifunc_block_m''' in this section. | ||
|- | |- | ||
| − | | 02 | + | | 02:27 |
| − | |Drag and drop it in | + | |Drag and drop it in '''untitled Xcos''' window. |
|- | |- | ||
| − | |02 | + | |02:32 |
| − | |I will zoom the untitled Xcos window for better view. | + | |I will zoom the '''untitled Xcos''' window for better view. |
|- | |- | ||
| − | | 02 | + | | 02:36 |
|I will use the Zoom button as you see. | |I will use the Zoom button as you see. | ||
| Line 198: | Line 180: | ||
|- | |- | ||
| − | | 02 | + | | 02:40 |
|Now double click on the '''scifunc''' block to configure it. | |Now double click on the '''scifunc''' block to configure it. | ||
| − | |||
| − | |||
|- | |- | ||
| − | |02 | + | |02:44 |
| − | |A window named ''' Scilab | + | |A window named ''' Scilab Multiple Values Request''' will open. |
|- | |- | ||
| − | | 02 | + | | 02:49 |
| This window will allow you to change the number of input and output ports of the '''scifunc''' block. | | This window will allow you to change the number of input and output ports of the '''scifunc''' block. | ||
|- | |- | ||
| − | | 02 | + | | 02:56 |
|Our function '''squareit''' has only one input and output variable. | |Our function '''squareit''' has only one input and output variable. | ||
| − | |||
|- | |- | ||
| − | | 03 | + | | 03:00 |
| − | | | + | | Hence, we will keep the settings unchanged. |
|- | |- | ||
| − | | 03 | + | | 03:03 |
| − | | Click on | + | | Click on '''OK'''. |
|- | |- | ||
| − | |03 | + | |03:05 |
| − | + | ||
| − | + | ||
| + | ||A new '''Scilab Input Value Request''' window will open. | ||
|- | |- | ||
| − | |03 | + | |03:09 |
|In the text box, type the function name along with input and output variables. | |In the text box, type the function name along with input and output variables. | ||
|- | |- | ||
| − | | 03 | + | | 03:14 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | |This function will be called by the '''scifunc''' block. | ||
|- | |- | ||
| − | | 03 | + | | 03:18 |
|In the text box available, | |In the text box available, | ||
| − | |||
|- | |- | ||
| − | | 03 | + | | 03:20 |
|edit the default function name. | |edit the default function name. | ||
| Line 268: | Line 243: | ||
|- | |- | ||
| − | | 03 | + | | 03:22 |
| − | |Type '''y1''' equal to '''squareit''' open bracket '''u1''' close the bracket | + | |Type '''y1''' equal to '''squareit''' open bracket '''u1''' close the bracket. |
|- | |- | ||
| − | | 03 | + | | 03:31 |
| − | + | ||
| − | + | ||
| + | |Note that here the input and output variables are '''u1''' and '''y1''' respectively. | ||
|- | |- | ||
| − | | 03 | + | | 03:37 |
|These should be strictly in '''u''' and '''y''' form and not as per the variable names used in the actual function. | |These should be strictly in '''u''' and '''y''' form and not as per the variable names used in the actual function. | ||
| − | |||
|- | |- | ||
| − | | 03 | + | | 03:45 |
|Cick on '''OK.''' | |Cick on '''OK.''' | ||
| Line 294: | Line 267: | ||
|- | |- | ||
| − | | 03 | + | | 03:47 |
| − | |Another '''Scilab | + | |Another '''Scilab Input Value Request''' window will open. |
|- | |- | ||
| − | | 03 | + | | 03:51 |
| − | + | ||
| − | + | ||
| + | |Keep clicking on '''OK''' in the subsequent 3 windows that will appear. | ||
|- | |- | ||
| − | |03 | + | |03:56 |
|The '''scifunc''' block is now configured. | |The '''scifunc''' block is now configured. | ||
| − | |||
|- | |- | ||
| − | | 04 | + | | 04:00 |
|Next we will include a '''sinusoid''' generator block. | |Next we will include a '''sinusoid''' generator block. | ||
| Line 320: | Line 291: | ||
|- | |- | ||
| − | | 04 | + | | 04:04 |
| − | + | ||
| − | + | ||
| + | | In the '''Palette browser''' window, click on '''Sources''' section. | ||
|- | |- | ||
| − | | 04 | + | | 04:08 |
| − | |Drag and drop the '''Sinusoid | + | |Drag and drop the '''Sinusoid generator''' block in '''Untitled Xcos''' window. |
|- | |- | ||
| − | | 04 | + | | 04:14 |
| − | |Place the block towards the left of the '''scifunc''' block for convenience. | + | |Place the block towards the left of the '''scifunc''' block, for convenience. |
|- | |- | ||
| − | | 04 | + | | 04:20 |
| Now we need a block to plot the output variable. | | Now we need a block to plot the output variable. | ||
|- | |- | ||
| − | | 04 | + | | 04:23 |
| − | | | + | |In the '''Palette browser''' window, click on the '''Sinks''' section. |
|- | |- | ||
| − | | 04 | + | | 04:29 |
| − | |Drag and drop the '''CScope''' block in the ''' | + | |Drag and drop the '''CScope''' block in the '''Untitled Xcos''' window. |
| − | + | ||
| − | + | ||
|- | |- | ||
| − | | 04 | + | | 04:34 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | | Place the block towards the right of the '''scifunc''' block. | ||
|- | |- | ||
| − | | 04 | + | | 04:38 |
| − | + | ||
| − | + | ||
| + | | Place it away from '''scifunc''' block, for convenience. | ||
|- | |- | ||
| − | | 04 | + | | 04:43 |
|Notice that the '''CScope''' block has a red input port. | |Notice that the '''CScope''' block has a red input port. | ||
| Line 375: | Line 340: | ||
|- | |- | ||
| − | | 04 | + | | 04:47 |
| − | + | ||
| − | + | ||
| + | | This is an event input. | ||
|- | |- | ||
| − | | 04 | + | | 04:49 |
|we need an event generator block. | |we need an event generator block. | ||
| − | |||
|- | |- | ||
| − | | 04 | + | | 04:52 |
| − | + | ||
| − | + | ||
| + | |In the ''' Palette browser window,''' click on '''Sources''' section. | ||
|- | |- | ||
| − | | 04 | + | | 04:57 |
| − | |Drag and drop the | + | |Drag and drop the CLOCK underscore c block in the '''Untitled Xcos''' window. |
|- | |- | ||
| − | | 05 | + | | 05:05 |
|Place it above the '''CScope''' block. | |Place it above the '''CScope''' block. | ||
| Line 408: | Line 370: | ||
|- | |- | ||
| − | | 05 | + | | 05:08 |
|Notice that the '''CScope''' block has only one input port. | |Notice that the '''CScope''' block has only one input port. | ||
| Line 414: | Line 376: | ||
|- | |- | ||
| − | | 05 | + | | 05:13 |
|But we want to plot both the input and output variables in a single plot window. | |But we want to plot both the input and output variables in a single plot window. | ||
| Line 420: | Line 382: | ||
|- | |- | ||
| − | | 05 | + | | 05:18 |
| − | |Hence, we need a multiplexer block | + | |Hence, we need a '''multiplexer''' block. |
|- | |- | ||
| − | | 05 | + | | 05:22 |
|This block will multiplex two inputs and generate output on one output port. | |This block will multiplex two inputs and generate output on one output port. | ||
| − | |||
| − | |||
|- | |- | ||
| − | | 05 | + | | 05:28 |
| − | |In the ''' | + | |In the '''Palette browser window,''' click on '''Signal Routing''' section. |
|- | |- | ||
| − | | 05 | + | | 05:33 |
| − | + | ||
| − | + | ||
| + | |Drag and drop the '''MUX''' block in the '''Untitled Xcos''' window. | ||
|- | |- | ||
| − | | 05 | + | | 05:39 |
| − | |Place the block between the '''scifunc''' block and '''CScope''' | + | |Place the block between the '''scifunc''' block and '''CScope''' block. |
|- | |- | ||
| − | | 05 | + | | 05:43 |
| − | |Let me resize and realign the '''Mux | + | |Let me resize and realign the '''Mux''' block. |
|- | |- | ||
| − | | 05 | + | | 05:47 |
| − | + | ||
| − | + | ||
| + | |Now, let us connect the blocks together. | ||
|- | |- | ||
| − | | 05 | + | | 05:51 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | |Connect the output port of '''Sinusoid generator''' block to the input port of '''scifunc''' block. | ||
|- | |- | ||
| − | | 05 | + | | 05:57 |
|Now connect the output port of '''scifunc''' block to the lower input port of the '''MUX.''' | |Now connect the output port of '''scifunc''' block to the lower input port of the '''MUX.''' | ||
| Line 480: | Line 436: | ||
|- | |- | ||
| − | | 06 | + | | 06:04 |
|Connect the output port of '''MUX''' block to the input port of '''CScope''' block. | |Connect the output port of '''MUX''' block to the input port of '''CScope''' block. | ||
| Line 486: | Line 442: | ||
|- | |- | ||
| − | | 06 | + | | 06:10 |
| − | |Connect the output port of | + | |Connect the output port of CLOCK underscore c block to the event input port of '''CScope''' block. |
|- | |- | ||
| − | | 06 | + | | 06:19 |
| − | |We also have to plot '''sine''' input. | + | |We also have to plot the '''sine''' input. |
|- | |- | ||
| − | | 06 | + | | 06:22 |
|We have to connect the '''Sinusoid generator''' block to the '''MUX.''' | |We have to connect the '''Sinusoid generator''' block to the '''MUX.''' | ||
| Line 503: | Line 459: | ||
|- | |- | ||
| − | | 06 | + | | 06:26 |
|Click on the upper input port of the '''MUX''' block. | |Click on the upper input port of the '''MUX''' block. | ||
| Line 509: | Line 465: | ||
|- | |- | ||
| − | | 06 | + | | 06:30 |
|Then without releasing, move your mouse pointer towards the link between the ''' Sinusoid generator''' block and '''scifunc''' block. | |Then without releasing, move your mouse pointer towards the link between the ''' Sinusoid generator''' block and '''scifunc''' block. | ||
| − | |||
|- | |- | ||
| − | | 06 | + | | 06:39 |
| − | |To bend the link, release the mouse button or click at places | + | |To bend the link, release the mouse button or click at places. |
|- | |- | ||
| − | | 06 | + | | 06:44 |
|As you bring the pointer on the link, the link turns green. | |As you bring the pointer on the link, the link turns green. | ||
| Line 528: | Line 483: | ||
|- | |- | ||
| − | | 06 | + | | 06:49 |
|Release the mouse button or click once to create a link between these two blocks. | |Release the mouse button or click once to create a link between these two blocks. | ||
| Line 534: | Line 489: | ||
|- | |- | ||
| − | | 06 | + | | 06:55 |
| − | |Now let us see the configuration of other blocks | + | |Now let us see the configuration of other blocks. |
|- | |- | ||
| − | | 06 | + | | 06:59 |
| We can change the '''frequency, magnitude''' and '''phase''' of the '''sinusoid generator''' block. | | We can change the '''frequency, magnitude''' and '''phase''' of the '''sinusoid generator''' block. | ||
| − | |||
|- | |- | ||
| − | | 07 | + | | 07:04 |
| − | |To do this, double click on the '''Sinusoid''' | + | |To do this, double click on the '''Sinusoid generator''' block. |
|- | |- | ||
| − | | 07 | + | | 07:09 |
|The configuration window will open. | |The configuration window will open. | ||
| Line 559: | Line 513: | ||
|- | |- | ||
| − | | 07 | + | | 07:11 |
| − | |We will keep the ''' | + | |We will keep the '''Magnitude''' and '''Frequency''' as 1 and '''Phase''' as 0. |
|- | |- | ||
| − | | 07 | + | | 07:18 |
| − | |Click on ''' | + | |Click on '''OK''' to close the configuration window. |
|- | |- | ||
| − | | 07 | + | | 07:21 |
|Now let us configure the '''CScope''' block. | |Now let us configure the '''CScope''' block. | ||
| Line 577: | Line 531: | ||
|- | |- | ||
| − | | 07 | + | | 07:25 |
|Double click on the '''CScope''' block to open its configuration window. | |Double click on the '''CScope''' block to open its configuration window. | ||
| Line 583: | Line 537: | ||
|- | |- | ||
| − | | 07 | + | | 07:30 |
| − | |Change the ''' Ymin''' parameter to minus 2 and '''Ymax''' parameter to 2 | + | |Change the '''Ymin''' parameter to minus 2 and '''Ymax''' parameter to 2. |
|- | |- | ||
| − | | 07 | + | | 07:37 |
|Change the '''Refresh period''' value to 10. | |Change the '''Refresh period''' value to 10. | ||
| Line 595: | Line 549: | ||
|- | |- | ||
| − | | 07 | + | | 07:41 |
|Make a mental note of this value. | |Make a mental note of this value. | ||
| Line 601: | Line 555: | ||
|- | |- | ||
| − | | 07 | + | | 07:44 |
| − | |Change the ''' | + | |Change the '''Buffer size''' value to 2 . |
|- | |- | ||
| − | | 07 | + | | 07:47 |
| − | + | ||
| − | + | ||
| + | |click on '''OK'''. | ||
|- | |- | ||
| − | | 07 | + | | 07:50 |
| − | |Now let us configure the '''CLOCK_c''' block | + | |Now let us configure the '''CLOCK_c''' block. |
|- | |- | ||
| − | | 07 | + | | 07:54 |
|Double click on the block to open its configuration window. | |Double click on the block to open its configuration window. | ||
| Line 626: | Line 579: | ||
|- | |- | ||
| − | | 07 | + | | 07:58 |
| − | |Keep the value of ''' Period''' | + | |Keep the value of '''Period''' as 0.1. |
|- | |- | ||
| − | | 08 | + | | 08:02 |
| − | |Change the ''' Initialisation Time''' to be 0. | + | |Change the '''Initialisation Time''' to be 0. |
|- | |- | ||
| − | | 08 | + | | 08:06 |
| − | |Click on OK | + | |Click on OK. |
|- | |- | ||
| − | | 08 | + | | 08:08 |
|Now let us change the '''Simulation''' parameters. | |Now let us change the '''Simulation''' parameters. | ||
| Line 650: | Line 603: | ||
|- | |- | ||
| − | | 08 | + | | 08:12 |
| − | |On the menu bar of the ''' | + | |On the menu bar of the '''Untitled Xcos''' window click on the '''Simulation''' tab. |
|- | |- | ||
| − | | 08 | + | | 08:17 |
| − | |Now click on ''' Setup from the drop down menu. | + | |Now click on '''Setup''' from the drop down menu. |
|- | |- | ||
| − | | 08 | + | | 08:22 |
| − | |Change the ''' Final Integration time''' to match the '''Refresh period''' of '''CScope''' block. | + | |Change the '''Final Integration time''' to match the '''Refresh period''' of '''CScope''' block. |
|- | |- | ||
| − | | 08 | + | | 08:28 |
|The value of '''Refresh period''' was 10. | |The value of '''Refresh period''' was 10. | ||
| Line 674: | Line 627: | ||
|- | |- | ||
| − | | 08 | + | | 08:32 |
|Hence, put the value of '''Final integration''' time as 10. | |Hence, put the value of '''Final integration''' time as 10. | ||
| Line 680: | Line 633: | ||
|- | |- | ||
| − | | 08 | + | | 08:36 |
| − | |Click on '''OK''' | + | |Click on '''OK'''. |
|- | |- | ||
| − | | 08 | + | | 08:38 |
|Now, click on '''File''' and then click on '''Save''' to save the '''Xcos''' diagram. | |Now, click on '''File''' and then click on '''Save''' to save the '''Xcos''' diagram. | ||
| − | |||
|- | |- | ||
| − | | 08 | + | | 08:44 |
|Choose a desired directory to save the '''Xcos''' diagram. | |Choose a desired directory to save the '''Xcos''' diagram. | ||
| Line 699: | Line 651: | ||
|- | |- | ||
| − | | 08 | + | | 08:48 |
|However, it is advised to save it in the folder where you have saved the '''squareit.sci''' file. | |However, it is advised to save it in the folder where you have saved the '''squareit.sci''' file. | ||
| Line 705: | Line 657: | ||
|- | |- | ||
| − | | 08 | + | | 08:56 |
| − | + | ||
| − | + | ||
| + | |Click on '''OK'''. | ||
|- | |- | ||
| − | | 08 | + | | 08:58 |
|Note that the '''scifunc''' block will call the ''' squareit''' function. | |Note that the '''scifunc''' block will call the ''' squareit''' function. | ||
| − | |||
|- | |- | ||
| − | | 09 | + | | 09:02 |
| − | |This means that we should first load the ''' squareit''' function before we execute the | + | |This means that we should first load the ''' squareit''' function before we execute the '''Xcos diagram'''. |
|- | |- | ||
| − | | 09 | + | | 09:09 |
|Switch to the ''' Scilab editor''' window, which has the '''squareit.sci''' file open. | |Switch to the ''' Scilab editor''' window, which has the '''squareit.sci''' file open. | ||
| Line 731: | Line 681: | ||
|- | |- | ||
| − | | 09 | + | | 09:16 |
|Click on the '''Execute''' button available on the '''menu bar''' of the editor. | |Click on the '''Execute''' button available on the '''menu bar''' of the editor. | ||
| Line 737: | Line 687: | ||
|- | |- | ||
| − | | 09 | + | | 09:21 |
|This will load the '''squareit''' function. | |This will load the '''squareit''' function. | ||
| − | |||
|- | |- | ||
| − | | 09 | + | | 09:24 |
|Now we can execute the '''Xcos''' diagram. | |Now we can execute the '''Xcos''' diagram. | ||
| Line 750: | Line 699: | ||
|- | |- | ||
| − | | 09 | + | | 09:28 |
| − | |Open the Xcos diagram file | + | |Open the '''Xcos diagram''' file. |
|- | |- | ||
| − | | 09 | + | | 09:31 |
| − | + | ||
| − | + | ||
| + | |Click on the '''Start''' button available on the '''menu bar''' of '''Xcos''' window. | ||
|- | |- | ||
| − | | 09 | + | | 09:37 |
|A graphic window will appear. | |A graphic window will appear. | ||
| Line 769: | Line 717: | ||
|- | |- | ||
| − | | 09 | + | | 09:39 |
|This window will have two plots. | |This window will have two plots. | ||
| Line 775: | Line 723: | ||
|- | |- | ||
| − | | 09 | + | | 09:42 |
|Input '''sine wave''' in black color and output '''sine wave''' in green color. | |Input '''sine wave''' in black color and output '''sine wave''' in green color. | ||
|- | |- | ||
| − | | 09 | + | | 09:47 |
|Notice that the squaring function implemented in the '''squareit''' function, has indeed squared the input sine wave. | |Notice that the squaring function implemented in the '''squareit''' function, has indeed squared the input sine wave. | ||
| Line 786: | Line 734: | ||
|- | |- | ||
| − | | 09 | + | | 09:55 |
|Hence, the output '''sine''' wave has been shifted to the positive axis. | |Hence, the output '''sine''' wave has been shifted to the positive axis. | ||
| Line 792: | Line 740: | ||
|- | |- | ||
| − | | 10 | + | | 10:00 |
| − | |Close the plot window | + | |Close the '''plot''' window. |
|- | |- | ||
| − | | 10 | + | | 10:02 |
| − | |Now, let us see how to edit the scifunc block to call a function which has more than one input and output variables. | + | |Now, let us see how to edit the '''scifunc''' block to '''call''' a function which has more than one input and output variables. |
|- | |- | ||
| − | | 10 | + | | 10:10 |
|Switch to '''scilab''' editor window. | |Switch to '''scilab''' editor window. | ||
| Line 810: | Line 758: | ||
|- | |- | ||
| − | | 10 | + | | 10:13 |
|Edit the '''squareit''' function to have two input and output variables. | |Edit the '''squareit''' function to have two input and output variables. | ||
| Line 816: | Line 764: | ||
|- | |- | ||
| − | | 10 | + | | 10:19 |
|Edit the output variable as open square bracket y comma z close the square bracket . | |Edit the output variable as open square bracket y comma z close the square bracket . | ||
| Line 822: | Line 770: | ||
|- | |- | ||
| − | | 10 | + | | 10:28 |
| − | |Edit the input variables as open bracket '''a''' comma '''b''' close bracket | + | |Edit the input variables as open bracket '''a''' comma '''b''' close bracket. |
|- | |- | ||
| − | | 10 | + | | 10:36 |
|We will change the function to shift the squared output by 1 unit. | |We will change the function to shift the squared output by 1 unit. | ||
| Line 834: | Line 782: | ||
|- | |- | ||
| − | | 10 | + | | 10:41 |
| − | |Edit the main function line as | + | |Edit the main function line as: |
|- | |- | ||
| − | | 10 | + | | 10:44 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | |'''y''' is equal to '''b''' plus '''a''' raise to two put a semicolon in the end. | ||
|- | |- | ||
| − | | 10 | + | | 10:51 |
|Also generate an output whose amplitude will be half of the input. | |Also generate an output whose amplitude will be half of the input. | ||
| Line 854: | Line 800: | ||
|- | |- | ||
| − | | 10 | + | | 10:56 |
| − | |Go to next line by pressing | + | |Go to next line by pressing '''Enter''' key and type: |
|- | |- | ||
| − | | 11 | + | | 11:01 |
| − | |'''z''' is equal to 0.5 multiplied by a put a semicolon in the end | + | |'''z''' is equal to 0.5 multiplied by a put a semicolon in the end. |
|- | |- | ||
| − | | 11 | + | | 11:10 |
| − | + | ||
| − | + | ||
| + | |Now save the file. | ||
|- | |- | ||
| − | | 11 | + | | 11:12 |
| − | | | + | | Switch to the '''Xcos''' window. |
|- | |- | ||
| − | | 11 | + | | 11:15 |
|Double click on the '''scifunc''' block to configure it. | |Double click on the '''scifunc''' block to configure it. | ||
| Line 885: | Line 830: | ||
|- | |- | ||
| − | | 11 | + | | 11:19 |
| − | |In the ''' input port size | + | |In the '''input port size''' field, put a semi colon after 1 comma 1 and type 1 comma one again. |
|- | |- | ||
| − | | 11 | + | | 11:27 |
| − | |Similarly, in the output port size field, put a semi colon after 1 comma 1 and type 1 comma 1 again | + | |Similarly, in the '''output port size''' field, put a semi colon after 1 comma 1 and type 1 comma 1 again. |
|- | |- | ||
| − | | 11 | + | | 11:36 |
| − | + | ||
| − | + | ||
| + | |Click on '''OK'''. | ||
|- | |- | ||
| − | | 11 | + | | 11:38 |
| − | |A new '''Scilab | + | |A new '''Scilab Input Value Request''' window will open. |
|- | |- | ||
| − | | 11 | + | | 11:41 |
|In the text box, | |In the text box, | ||
| Line 916: | Line 860: | ||
|- | |- | ||
| − | | 11 | + | | 11:43 |
| − | | | + | |put a comma after y1 and type y2, |
|- | |- | ||
| − | | 11 | + | | 11:48 |
| − | | | + | |put y1 and y2 in square brackets, |
|- | |- | ||
| − | | 11 | + | | 11:52 |
| − | | | + | |now put a comma after '''u1''' and type '''u2'''. |
|- | |- | ||
| − | | 11 | + | | 11:57 |
| − | |Click on OK | + | |Click on '''OK'''. |
|- | |- | ||
| − | | 11 | + | | 11:59 |
| − | |Another '''Scilab | + | |Another '''Scilab Input Value Request''' window will open. |
|- | |- | ||
| − | | 12 | + | | 12:03 |
| − | |Keep clicking on ''' | + | |Keep clicking on '''OK''' in the subsequent 3 windows that will appear. |
|- | |- | ||
| − | | 12 | + | | 12:08 |
|The '''scifunc''' block is now configured. | |The '''scifunc''' block is now configured. | ||
| Line 958: | Line 902: | ||
|- | |- | ||
| − | | 12 | + | | 12:11 |
| − | |Let me realign the scifunc block | + | |Let me realign the '''scifunc''' block. |
|- | |- | ||
| − | | 12 | + | | 12:14 |
| − | |Switch to the ''' | + | |Switch to the ''' Palette browser''' window. |
|- | |- | ||
| − | | 12 | + | | 12:17 |
| − | |In the ''' | + | |In the '''Sources''' section, drag and drop the '''Constant underscore m''' block in the '''Xcos''' window. |
|- | |- | ||
| − | | 12 | + | | 12:24 |
| − | + | ||
| − | + | ||
| + | |Place it below the '''Sinusoid generator''' block. | ||
|- | |- | ||
| − | | 12 | + | | 12:28 |
| − | |Connect the ''' Constant underscore m''' block to the lower input of the '''scifunc''' block | + | |Connect the '''Constant underscore m''' block to the lower input of the '''scifunc''' block. |
|- | |- | ||
| − | | 12 | + | | 12:36 |
|The default value of this block is 1. | |The default value of this block is 1. | ||
| Line 994: | Line 937: | ||
|- | |- | ||
| − | | 12 | + | | 12:39 |
|Keep it unchanged. | |Keep it unchanged. | ||
| Line 1,000: | Line 943: | ||
|- | |- | ||
| − | | 12 | + | | 12:41 |
|Double click on the '''MUX''' block. | |Double click on the '''MUX''' block. | ||
| Line 1,006: | Line 949: | ||
|- | |- | ||
| − | | 12 | + | | 12:44 |
| − | |Change the ''' input port size''' to 3 | + | |Change the '''input port size''' to 3. |
|- | |- | ||
| − | | 12 | + | | 12:47 |
| − | |Click on '''OK''' | + | |Click on '''OK'''. |
|- | |- | ||
| − | | 12 | + | | 12:48 |
|Let me resize the '''MUX''' block and I will connect '''MUX''' and '''CSCOPE''' block properly. | |Let me resize the '''MUX''' block and I will connect '''MUX''' and '''CSCOPE''' block properly. | ||
| Line 1,024: | Line 967: | ||
|- | |- | ||
| − | | 12 | + | | 12:59 |
| − | + | ||
| − | + | ||
| + | |Connect the lower output port of the '''scifunc''' block to the lower input port of '''MUX''' block. | ||
|- | |- | ||
| − | | 13 | + | | 13:07 |
| − | |Click on '''File''' and choose '''Save''' to save the xcos file. | + | |Click on '''File''' and choose '''Save''' to save the '''xcos''' file. |
|- | |- | ||
| − | | 13 | + | | 13:12 |
|Switch to the '''Scilab editor''' which has the '''squareit.sci''' file open. | |Switch to the '''Scilab editor''' which has the '''squareit.sci''' file open. | ||
| Line 1,043: | Line 985: | ||
|- | |- | ||
| − | | 13 | + | | 13:18 |
|Click on the '''Execute''' button available on the '''menu bar''' of the editor. | |Click on the '''Execute''' button available on the '''menu bar''' of the editor. | ||
| Line 1,049: | Line 991: | ||
|- | |- | ||
| − | | 13 | + | | 13:23 |
|This will load the '''squareit''' function. | |This will load the '''squareit''' function. | ||
| Line 1,055: | Line 997: | ||
|- | |- | ||
| − | | 13 | + | | 13:26 |
|Now we can execute the '''Xcos''' diagram. | |Now we can execute the '''Xcos''' diagram. | ||
| Line 1,061: | Line 1,003: | ||
|- | |- | ||
| − | | 13 | + | | 13:30 |
| − | |Click on the '''Start''' button available on the '''menu bar''' of | + | |Click on the '''Start''' button available on the '''menu bar''' of the '''Xcos''' window. |
|- | |- | ||
| − | | 13 | + | | 13:35 |
|A graphic window will appear. | |A graphic window will appear. | ||
| Line 1,073: | Line 1,015: | ||
|- | |- | ||
| − | | 13 | + | | 13:38 |
|This window will have three plots. | |This window will have three plots. | ||
| Line 1,079: | Line 1,021: | ||
|- | |- | ||
| − | | 13 | + | | 13:40 |
|Input '''sine wave''' in black color, | |Input '''sine wave''' in black color, | ||
| Line 1,085: | Line 1,027: | ||
|- | |- | ||
| − | | 13 | + | | 13:43 |
|output ''' sine wave''' in green color and | |output ''' sine wave''' in green color and | ||
|- | |- | ||
| − | | 13 | + | | 13:45 |
| − | | amplitude scaled input in red colour | + | | amplitude scaled input in red colour. |
|- | |- | ||
| − | | 13 | + | | 13:49 |
|Notice that the function has indeed squared the input '''sine wave''' and also shifted it by an offset of 1 unit, which is as expected. | |Notice that the function has indeed squared the input '''sine wave''' and also shifted it by an offset of 1 unit, which is as expected. | ||
| Line 1,102: | Line 1,044: | ||
|- | |- | ||
| − | | 13 | + | | 13:59 |
| − | |We also get the amplitude scaled of the input '''sine wave,''' as expected | + | |We also get the amplitude scaled of the input '''sine wave,''' as expected. |
|- | |- | ||
| − | | 14 | + | | 14:05 |
| − | |Close the plot window | + | |Close the plot window. |
|- | |- | ||
| − | | 14 | + | | 14:08 |
|Now let us summarize. | |Now let us summarize. | ||
| Line 1,120: | Line 1,062: | ||
|- | |- | ||
| − | | 14 | + | | 14:10 |
| − | + | ||
| − | + | ||
| + | |In this tutorial we learnt: | ||
|- | |- | ||
| − | | 14 | + | | 14:12 |
| − | |To write a squaring function in '''Scilab''' | + | |* To write a squaring function in '''Scilab''' |
|- | |- | ||
| − | | 14 | + | | 14:15 |
| − | |To use the '''scifunc''' block in '''Xcos ''' | + | |* To use the '''scifunc''' block in '''Xcos ''' |
|- | |- | ||
| − | | 14 | + | | 14:19 |
| − | |To use '''MUX ''' block to draw multiple plots | + | |* To use '''MUX ''' block to draw multiple plots |
|- | |- | ||
| − | | 14 | + | | 14:22 |
| − | + | ||
| − | + | ||
| + | |* To call functions having multiple input and output. | ||
|- | |- | ||
| − | |14 | + | |14:26 |
| − | | Watch the video available at the following link | + | | Watch the video available at the following link. |
|- | |- | ||
| − | | 14 | + | | 14:29 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | | It summarizes the Spoken Tutorial project. | ||
|- | |- | ||
| − | |14 | + | |14:33 |
| − | ||If you do not have good bandwidth, you can download and watch it | + | ||If you do not have good bandwidth, you can download and watch it. |
|- | |- | ||
| − | |14 | + | |14:37 |
| − | ||The spoken tutorial project Team | + | ||The spoken tutorial project Team: |
|- | |- | ||
| − | |14 | + | |14:40 |
| − | + | ||
| − | + | ||
| + | ||Conducts workshops using spoken tutorials. | ||
|- | |- | ||
| − | |14 | + | |14:43 |
| − | + | ||
| − | + | ||
| + | ||Gives certificates for those who pass an online test. | ||
|- | |- | ||
| − | |14 | + | |14:47 |
||For more details, please write to contact@spoken-tutorial.org | ||For more details, please write to contact@spoken-tutorial.org | ||
| − | |||
|- | |- | ||
| − | |14 | + | |14:53 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | |Spoken Tutorial Project is a part of Talk to a Teacher project. | ||
|- | |- | ||
| − | | 14 | + | | 14:57 |
| It is supported by the National Mission on Eduction through ICT, MHRD, Government of India. | | It is supported by the National Mission on Eduction through ICT, MHRD, Government of India. | ||
|- | |- | ||
| − | | 15 | + | | 15:05 |
| − | + | ||
| − | + | ||
| − | + | ||
| + | |More information on this mission is available at spoken-tutorial.org/NMEICT-Intro. | ||
|- | |- | ||
| − | |15 | + | |15:15 |
| − | | Thank you for joining .Hope you found this tutorial useful | + | | Thank you for joining. Hope you found this tutorial useful. |
|- | |- | ||
| − | | 15 | + | | 15:19 |
| − | |This is Anuradha Amruthkar from IIT Bombay signing off. | + | |This is Anuradha Amruthkar from IIT Bombay, signing off. |
Latest revision as of 11:55, 4 March 2015
| Time | Narration |
| 00:01 | Welcome to the spoken tutorial on Calling user-defined functions in Xcos. |
| 00:07 | In this tutorial we will learn: |
| 00:09 | * To write a squaring function in Scilab |
| 00:12 | * To use the scifunc block in Xcos |
| 00:15 | * To use MUX block to draw multiple plots |
| 00:19 | * To call functions having multiple inputs and outputs. |
| 00:24 | Ubuntu 12.04 is the operating system used with Scilab version 5.3.3 installed. |
| 00:32 | You should have basic knowledge of Scilab, |
| 00:35 | basic knowledge of Xcos. |
| 00:38 | If not, for relevant tutorials, please visit spoken hyphen tutorial dot org. |
| 00:44 | Start Scilab on your computer. |
| 00:47 | In the Scilab console, type editor and press Enter. |
| 00:53 | Then type the following code: |
| 00:55 | function space y is equal to squareit open bracket a close bracket. |
| 01:07 | Press the Enter key and type: |
| 01:10 | y is equal to a raise to 2 |
| 01:14 | put a semicolon in the end. |
| 01:17 | The function has one input variable a and one output variable y. |
| 01:24 | The name of the function is squareit. |
| 01:27 | This function will do the job of squaring the variable a. |
| 01:31 | It will store the result in y. |
| 01:34 | Let us save this file in the desired directory. |
| 01:38 | I will save this file with file name squareit and extension .sci. |
| 01:44 | Here we are following the convention of saving functions in .sci format. |
| 01:50 | Switch to the Scilab console. |
| 01:53 | Now, type Xcos and press Enter. |
| 01:57 | Two windows will open, |
| 01:59 | a Palette browser and an Untitled Xcos window. |
| 02:04 | Now we will make the Xcos diagram. |
| 02:06 | This will access the function squareit created just now. |
| 02:10 | This can be done by using scifunc block. |
| 02:14 | Switch to the Palette browser window. |
| 02:17 | Click on the User-Defined function in the pallet browser. |
| 02:21 | Locate the block scifunc_block_m in this section. |
| 02:27 | Drag and drop it in untitled Xcos window. |
| 02:32 | I will zoom the untitled Xcos window for better view. |
| 02:36 | I will use the Zoom button as you see. |
| 02:40 | Now double click on the scifunc block to configure it. |
| 02:44 | A window named Scilab Multiple Values Request will open. |
| 02:49 | This window will allow you to change the number of input and output ports of the scifunc block. |
| 02:56 | Our function squareit has only one input and output variable. |
| 03:00 | Hence, we will keep the settings unchanged. |
| 03:03 | Click on OK. |
| 03:05 | A new Scilab Input Value Request window will open. |
| 03:09 | In the text box, type the function name along with input and output variables. |
| 03:14 | This function will be called by the scifunc block. |
| 03:18 | In the text box available, |
| 03:20 | edit the default function name. |
| 03:22 | Type y1 equal to squareit open bracket u1 close the bracket. |
| 03:31 | Note that here the input and output variables are u1 and y1 respectively. |
| 03:37 | These should be strictly in u and y form and not as per the variable names used in the actual function. |
| 03:45 | Cick on OK. |
| 03:47 | Another Scilab Input Value Request window will open. |
| 03:51 | Keep clicking on OK in the subsequent 3 windows that will appear. |
| 03:56 | The scifunc block is now configured. |
| 04:00 | Next we will include a sinusoid generator block. |
| 04:04 | In the Palette browser window, click on Sources section. |
| 04:08 | Drag and drop the Sinusoid generator block in Untitled Xcos window. |
| 04:14 | Place the block towards the left of the scifunc block, for convenience. |
| 04:20 | Now we need a block to plot the output variable. |
| 04:23 | In the Palette browser window, click on the Sinks section. |
| 04:29 | Drag and drop the CScope block in the Untitled Xcos window. |
| 04:34 | Place the block towards the right of the scifunc block. |
| 04:38 | Place it away from scifunc block, for convenience. |
| 04:43 | Notice that the CScope block has a red input port. |
| 04:47 | This is an event input. |
| 04:49 | we need an event generator block. |
| 04:52 | In the Palette browser window, click on Sources section. |
| 04:57 | Drag and drop the CLOCK underscore c block in the Untitled Xcos window. |
| 05:05 | Place it above the CScope block. |
| 05:08 | Notice that the CScope block has only one input port. |
| 05:13 | But we want to plot both the input and output variables in a single plot window. |
| 05:18 | Hence, we need a multiplexer block. |
| 05:22 | This block will multiplex two inputs and generate output on one output port. |
| 05:28 | In the Palette browser window, click on Signal Routing section. |
| 05:33 | Drag and drop the MUX block in the Untitled Xcos window. |
| 05:39 | Place the block between the scifunc block and CScope block. |
| 05:43 | Let me resize and realign the Mux block. |
| 05:47 | Now, let us connect the blocks together. |
| 05:51 | Connect the output port of Sinusoid generator block to the input port of scifunc block. |
| 05:57 | Now connect the output port of scifunc block to the lower input port of the MUX. |
| 06:04 | Connect the output port of MUX block to the input port of CScope block. |
| 06:10 | Connect the output port of CLOCK underscore c block to the event input port of CScope block. |
| 06:19 | We also have to plot the sine input. |
| 06:22 | We have to connect the Sinusoid generator block to the MUX. |
| 06:26 | Click on the upper input port of the MUX block. |
| 06:30 | Then without releasing, move your mouse pointer towards the link between the Sinusoid generator block and scifunc block. |
| 06:39 | To bend the link, release the mouse button or click at places. |
| 06:44 | As you bring the pointer on the link, the link turns green. |
| 06:49 | Release the mouse button or click once to create a link between these two blocks. |
| 06:55 | Now let us see the configuration of other blocks. |
| 06:59 | We can change the frequency, magnitude and phase of the sinusoid generator block. |
| 07:04 | To do this, double click on the Sinusoid generator block. |
| 07:09 | The configuration window will open. |
| 07:11 | We will keep the Magnitude and Frequency as 1 and Phase as 0. |
| 07:18 | Click on OK to close the configuration window. |
| 07:21 | Now let us configure the CScope block. |
| 07:25 | Double click on the CScope block to open its configuration window. |
| 07:30 | Change the Ymin parameter to minus 2 and Ymax parameter to 2. |
| 07:37 | Change the Refresh period value to 10. |
| 07:41 | Make a mental note of this value. |
| 07:44 | Change the Buffer size value to 2 . |
| 07:47 | click on OK. |
| 07:50 | Now let us configure the CLOCK_c block. |
| 07:54 | Double click on the block to open its configuration window. |
| 07:58 | Keep the value of Period as 0.1. |
| 08:02 | Change the Initialisation Time to be 0. |
| 08:06 | Click on OK. |
| 08:08 | Now let us change the Simulation parameters. |
| 08:12 | On the menu bar of the Untitled Xcos window click on the Simulation tab. |
| 08:17 | Now click on Setup from the drop down menu. |
| 08:22 | Change the Final Integration time to match the Refresh period of CScope block. |
| 08:28 | The value of Refresh period was 10. |
| 08:32 | Hence, put the value of Final integration time as 10. |
| 08:36 | Click on OK. |
| 08:38 | Now, click on File and then click on Save to save the Xcos diagram. |
| 08:44 | Choose a desired directory to save the Xcos diagram. |
| 08:48 | However, it is advised to save it in the folder where you have saved the squareit.sci file. |
| 08:56 | Click on OK. |
| 08:58 | Note that the scifunc block will call the squareit function. |
| 09:02 | This means that we should first load the squareit function before we execute the Xcos diagram. |
| 09:09 | Switch to the Scilab editor window, which has the squareit.sci file open. |
| 09:16 | Click on the Execute button available on the menu bar of the editor. |
| 09:21 | This will load the squareit function. |
| 09:24 | Now we can execute the Xcos diagram. |
| 09:28 | Open the Xcos diagram file. |
| 09:31 | Click on the Start button available on the menu bar of Xcos window. |
| 09:37 | A graphic window will appear. |
| 09:39 | This window will have two plots. |
| 09:42 | Input sine wave in black color and output sine wave in green color. |
| 09:47 | Notice that the squaring function implemented in the squareit function, has indeed squared the input sine wave. |
| 09:55 | Hence, the output sine wave has been shifted to the positive axis. |
| 10:00 | Close the plot window. |
| 10:02 | Now, let us see how to edit the scifunc block to call a function which has more than one input and output variables. |
| 10:10 | Switch to scilab editor window. |
| 10:13 | Edit the squareit function to have two input and output variables. |
| 10:19 | Edit the output variable as open square bracket y comma z close the square bracket . |
| 10:28 | Edit the input variables as open bracket a comma b close bracket. |
| 10:36 | We will change the function to shift the squared output by 1 unit. |
| 10:41 | Edit the main function line as: |
| 10:44 | y is equal to b plus a raise to two put a semicolon in the end. |
| 10:51 | Also generate an output whose amplitude will be half of the input. |
| 10:56 | Go to next line by pressing Enter key and type: |
| 11:01 | z is equal to 0.5 multiplied by a put a semicolon in the end. |
| 11:10 | Now save the file. |
| 11:12 | Switch to the Xcos window. |
| 11:15 | Double click on the scifunc block to configure it. |
| 11:19 | In the input port size field, put a semi colon after 1 comma 1 and type 1 comma one again. |
| 11:27 | Similarly, in the output port size field, put a semi colon after 1 comma 1 and type 1 comma 1 again. |
| 11:36 | Click on OK. |
| 11:38 | A new Scilab Input Value Request window will open. |
| 11:41 | In the text box, |
| 11:43 | put a comma after y1 and type y2, |
| 11:48 | put y1 and y2 in square brackets, |
| 11:52 | now put a comma after u1 and type u2. |
| 11:57 | Click on OK. |
| 11:59 | Another Scilab Input Value Request window will open. |
| 12:03 | Keep clicking on OK in the subsequent 3 windows that will appear. |
| 12:08 | The scifunc block is now configured. |
| 12:11 | Let me realign the scifunc block. |
| 12:14 | Switch to the Palette browser window. |
| 12:17 | In the Sources section, drag and drop the Constant underscore m block in the Xcos window. |
| 12:24 | Place it below the Sinusoid generator block. |
| 12:28 | Connect the Constant underscore m block to the lower input of the scifunc block. |
| 12:36 | The default value of this block is 1. |
| 12:39 | Keep it unchanged. |
| 12:41 | Double click on the MUX block. |
| 12:44 | Change the input port size to 3. |
| 12:47 | Click on OK. |
| 12:48 | Let me resize the MUX block and I will connect MUX and CSCOPE block properly. |
| 12:59 | Connect the lower output port of the scifunc block to the lower input port of MUX block. |
| 13:07 | Click on File and choose Save to save the xcos file. |
| 13:12 | Switch to the Scilab editor which has the squareit.sci file open. |
| 13:18 | Click on the Execute button available on the menu bar of the editor. |
| 13:23 | This will load the squareit function. |
| 13:26 | Now we can execute the Xcos diagram. |
| 13:30 | Click on the Start button available on the menu bar of the Xcos window. |
| 13:35 | A graphic window will appear. |
| 13:38 | This window will have three plots. |
| 13:40 | Input sine wave in black color, |
| 13:43 | output sine wave in green color and |
| 13:45 | amplitude scaled input in red colour. |
| 13:49 | Notice that the function has indeed squared the input sine wave and also shifted it by an offset of 1 unit, which is as expected. |
| 13:59 | We also get the amplitude scaled of the input sine wave, as expected. |
| 14:05 | Close the plot window. |
| 14:08 | Now let us summarize. |
| 14:10 | In this tutorial we learnt: |
| 14:12 | * To write a squaring function in Scilab |
| 14:15 | * To use the scifunc block in Xcos |
| 14:19 | * To use MUX block to draw multiple plots |
| 14:22 | * To call functions having multiple input and output. |
| 14:26 | Watch the video available at the following link. |
| 14:29 | It summarizes the Spoken Tutorial project. |
| 14:33 | If you do not have good bandwidth, you can download and watch it. |
| 14:37 | The spoken tutorial project Team: |
| 14:40 | Conducts workshops using spoken tutorials. |
| 14:43 | Gives certificates for those who pass an online test. |
| 14:47 | For more details, please write to contact@spoken-tutorial.org |
| 14:53 | Spoken Tutorial Project is a part of Talk to a Teacher project. |
| 14:57 | It is supported by the National Mission on Eduction through ICT, MHRD, Government of India. |
| 15:05 | More information on this mission is available at spoken-tutorial.org/NMEICT-Intro. |
| 15:15 | Thank you for joining. Hope you found this tutorial useful. |
| 15:19 | This is Anuradha Amruthkar from IIT Bombay, signing off. |
