Nancyvarkey at 12:07, 21 September 2021

2021-09-21T12:07:48Z

Utkarsha at 15:55, 4 September 2021

2021-09-04T15:55:52Z

Utkarsha: Created page with "'''Title of script''': Conditional operations in Xcos '''Author: Rupak Rokade and Utkarsh''' '''Keywords: Xcos, conditional operation, scilab, if-else, loops''' {|border..."

2021-08-06T13:08:23Z

Created page with "'''Title of script''': Conditional operations in Xcos '''Author: Rupak Rokade and Utkarsh''' '''Keywords: Xcos, conditional operation, scilab, if-else, loops''' {|border..."

New page

'''Title of script''': Conditional operations in Xcos

'''Author: Rupak Rokade and Utkarsh'''

'''Keywords: Xcos, conditional operation, scilab, if-else, loops'''

{|border = 1
| '''Visual Cue'''
| '''Narration'''
|-
|
Show Slide:

'''Title Slide'''
| Hello and welcome to the Spoken Tutorial on “'''Conditional Operations in Xcos'''”.
|-
|
Show Slide:

'''Learning Objectives'''
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In this tutorial, we will learn how to:
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Show Slide:

'''System Requirements'''
| To record this tutorial, I am using
|-
|
Show Slide:

'''Pre-requisites'''
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To follow this tutorial, you should have :

If not, then go through the '''Scilab''' spoken tutorials on this website.
|-
|
Show Slide:

'''Code Files'''
|
|-
| Cursor on the '''Untitled Xcos''' window.
|
I have already opened the '''Xcos''' window.

We can see two windows named '''Untitled Xcos''' and the '''Palette browser.'''
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|
On the '''Untitled Xcos''' window,

Cursor on '''Toolbar''' >> Click on '''Open file''' option >> Click on '''ConditionalOperations.xcos''' >> Click on '''OK.'''
|
Go to the '''Untitled Xcos''' window.

Click on the '''Open File''' icon on the '''Toolbar'''.

A window will appear.

Go to the '''Downloads''' folder and select the file '''ConditionalOperations.xcos.'''

Then click on the '''OK''' button.

I have already created this file for demonstration.
|-
| cursor on the '''ConditionalOperations.xcos '''window.
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This file has a simple '''Xcos''' simulation diagram.
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| Cursor on '''ConditionalOperations.xcos window'''
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Let us add conditional expressions to this file.

To add conditional expressions we will use the '''Expression''' block.
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On '''palette browser''',

click on '''user-defined-functions''' >> click on '''Expression.'''
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Go to the''' palette browser''' window.

Click on the '''User-Defined-Functions''' section.

In the right panel, select the '''Expression''' block.
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| Drag the '''Expressio'''n block and drop it on the '''ConditionalOperations.xcos window.'''
| '''Drag and drop''' the '''Expression''' block on the '''ConditionalOperations.xcos''' window.
|-
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On '''ConditionalOperations.xcos window''',

Double click on the '''Expression''' block.
| Double click on the''' Expression block''' to configure its properties.
|-
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On '''Scilab Multiple Request''' Window,

Double click on '''Number of Input''' textbox to highlight it >> Change it to '''1'''.
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First is the '''number of inputs'''.

By default it is '''2''' which means it can receive 2 input values.

Let us change it to '''1'''.
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On '''Scilab Multiple Request''' Window,

Double click on '''scilab expression '''textbox to highlight it >> type '''(u1>10)*1 .'''
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Next, is the '''conditional expression'''.

This is the expression which will be evaluated by the '''Expression''' block.

In '''Xcos, '''by default variables like '''u1, u2''' are used while writing the conditional expressions.

Let us change the default expression.

Enter the expression as shown here.
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On '''Scilab Multiple Request''' Window,

Double click on the scilab''' expression '''textbox to highlight it.
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This means that, if '''''u1 > 10''''' then the block should return''' 1'''.
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On '''Scilab Multiple Request''' Window,

Click on the '''OK''' button.
| Click on the '''OK''' button.
|-
| Cursor on '''ConditionalOperations.xcos window'''
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Let us display the output of the '''Expression''' block.

To do this, we will use the '''AFFICH_m''' block.
|-
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On '''palette browser''',

click on '''sinks''' >> click on '''AFFICH_m.'''
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Go to the''' palette browser''' window.

Click on the '''Sinks''' section.

In the right panel, select the '''AFFICH_m''' block.
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| Drag the '''AFFICH_m''' block and drop it on the '''ConditionalOperations.xcos window.'''
| '''Drag and drop''' the '''AFFICH_m''' block on the '''ConditionalOperations.xcos''' window.
|-
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Let us make the connections.

Select the '''black input port''' of the '''EXPRESSION''' block.

Connect it to the line joining the''' RAMP''' and the '''CSCOPE''' block.
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Next, Select the '''black output port''' of the '''EXPRESSION''' block.

Connect it to the '''black input port''' of the '''AFFICH_m''' block.
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Lastly, Select the '''red input port''' of the '''AFFICH_m '''block.

Connect it to the line joining the''' CLOCK_c''' and the '''CSCOPE''' block.

Our file is ready for simulation.
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On the''' menu bar,'''

Click on '''Simulation''' >> Click on '''Setup.'''
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Before that, we need to change the execution time to Real time.

On the '''menu bar''', click on '''Simulation.'''

Click on '''Setup.'''
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On '''Set parameters '''window''','''

Change '''Real Time Scaling''' to 1 >> Click on '''OK''' button.
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Change '''Real Time Scaling''' to '''1'''.

Click on the '''OK''' button.
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On the '''ConditionalOperations.xcos''' window,

Click on '''Start''' button on the toolbar >> click on '''OK''' button on the Warning Message.
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Let us run this simulation by clicking on the '''Start''' Button on the '''toolbar'''.

An '''Warning Message''' will appear.

Ignore the message and click on the '''OK''' button.
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On the '''ConditionalOperations.xcos '''window,

Cursor on '''AFFICH_m''' block.
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We can see the '''AFFICH_m '''block displays '''0''' as long as the graph is less than '''10''' .

After the graph exceeds '''10''' the '''AFFICH_m''' block displays '''1'''.
|-
| Cursor on the '''Graphic Window.'''
|
Suppose we want our simulation to end after some condition has been achieved.

To do this, we will use the '''IFTHEL_f''' block. This is the '''IF-ELSE''' block.
|-
| Close the '''Graphic Window.'''
| Let us close the '''Graphic window.'''
|-
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On '''palette browser''',

click on '''Event-Handling''' >> click on '''IFTHEL_f.'''
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Go to the''' palette browser''' window.

Click on the '''Event Handling''' section.

In the right panel, select the '''IFTHEL_f''' block.
|-
| Drag the '''IFTHEL_f ''' block and drop it on the '''ConditionalOperations.xcos window.'''
| '''Drag and drop''' the '''IFTHEL_f''' block on the '''ConditionalOperations.xcos''' window.
|-
|
On the '''ConditionalOperations.xcos '''window,

Cursor on '''IFTHEL_m '''block.
| Now, to halt the simulation we would need the '''HALT_f''' block.
|-
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On '''palette browser''',

click on '''Event-Handling''' >> click on '''HALT_f.'''
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Go to the''' palette browser''' window.

Click on the '''Event Handling''' section.

In the right panel, select the '''HALT_f''' block.
|-
| Drag the '''HALT_f ''' block and drop it on the '''ConditionalOperations.xcos window.'''
| '''Drag and drop''' the '''HALT_f''' block on the '''ConditionalOperations.xcos''' window.
|-
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On the '''ConditionalOperations.xcos '''window,

Cursor on '''HALT_f '''block.
| The''' HALT_f '''block will end the simulation when the condition in the '''IFTHEL_f''' block is satisfied.
|-
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Let us make the connections.

Select the '''black input port''' of the '''IFTHEL_f''' block.

Connect it to the line joining the''' EXPRESSION''' and the '''AFFICH_m''' block.
|-
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Next, Select any of the '''red output ports''' of the '''IFTHEL_f''' block.

Connect it to the '''red input port''' of the '''HALT_f''' block.
|-
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On '''ConditionalOperations.xcos Window''',

Connect as per narration'''.'''
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Lastly, Select the '''red input port''' of the '''IFTHEL_f''' block.

Connect it to the line entering the '''red input port''' of the '''AFFICH_m '''block'''.'''
|-
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On the '''ConditionalOperations.xcos''' window,

Click on '''Start''' button on the toolbar >> click on '''OK''' button on the Warning Message.
|
Let us run this simulation again by clicking on the '''Start''' Button on the '''toolbar'''.

An '''Warning Message''' will appear.

Ignore the message and click on the '''OK''' button.
|-
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On the '''ConditionalOperations.xcos '''window,

Cursor on '''AFFICH_m '''block.
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Observe that as soon as the value in the '''AFFICH_m''' block becomes '''1''', the simulation stops.

So this way we can use conditional operations in '''Xcos'''.
|-
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Show Slide:

'''Summary'''
|
This brings us to the end of this tutorial. Let us summarise.

In this tutorial, we have learnt to:
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Show Slide:

'''Assignment'''
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As an assignment

Create a '''Xcos''' Simulation file to:
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| Show Slide: '''About Spoken Tutorial project'''
|
The video at the following link summarises the Spoken Tutorial project.

Please download and watch it
|-
| Show Slide: '''Spoken Tutorial Workshops'''
|
The Spoken Tutorial Project team conducts workshops and gives certificates.

For more details, please write to us.
|-
|
Show Slide:

'''Answers for THIS Spoken Tutorial'''
|
Please post your timed queries in this forum.
|-
| Show Slide: '''FOSSEE Forum'''
| Please post your general and technical queries on '''Scilab''' in this forum.
|-
|
Show Slide:

'''Textbook Companion project.'''
|
The FOSSEE team coordinates the Textbook Companion project.

We give Certificates and Honorarium to the contributors.

For more details, please visit this site.
|-
|
Show Slide: '''Lab Migration'''
|
The FOSSEE team coordinates the Lab Migration project.

For more details, please visit this site.
|-
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Show Slide: '''Acknowledgement'''
| Spoken Tutorial and FOSSEE projects are funded by the Ministry of Education, Government of India.
|-
| Show Slide: '''Thank you'''
|
This is Utkarsh, FOSSEE intern 2021, IIT Bombay signing off.

Thanks for joining.
|}

''' '''

Scilab/C4/Conditional-operations-in-Xcos/English - Revision history

Nancyvarkey at 12:07, 21 September 2021

Utkarsha at 15:55, 4 September 2021

Utkarsha: Created page with "'''Title of script''': Conditional operations in Xcos '''Author: Rupak Rokade and Utkarsh''' '''Keywords: Xcos, conditional operation, scilab, if-else, loops''' {|border..."