Difference between revisions of "OpenModelica/C2/Array-Functions-and-Operations/English-timed"

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|-
 
|-
 
|| 00:01
 
|| 00:01
−
|| Welcome to the Spoken Tutorial on '''Array Functions and Operations'''.
+
|| Welcome to the '''Spoken Tutorial''' on '''Array Functions and Operations'''.
  
 
|-
 
|-
 
|| 00:07
 
|| 00:07
−
|| In this tutorial, we are going to learn:  how to use '''OMShell''' , how to use '''array construction functions'''.
+
|| In this tutorial, we are going to learn:   
 +
how to use '''OMShell''' ,  
 +
how to use '''array construction functions''',
  
 
|-
 
|-
 
|| 00:17
 
|| 00:17
−
|| how to perform '''arithmetic operations''' on '''vectors''' and '''matrices'''.
+
|| how to perform arithmetic operations on '''vector'''s and matrices,
 
   
 
   
 
|-
 
|-
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|-
 
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|| 00:27
 
|| 00:27
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|| To record this tutorial, I am using '''OpenModelica 1.9.2''' '''Ubuntu Operating System version 14.04''' and  '''gedit'''
+
|| To record this tutorial, I am using '''OpenModelica 1.9.2''', '''Ubuntu Operating System''' version 14.04 and  '''gedit'''.
  
 
|-
 
|-
 
|| 00:40
 
|| 00:40
−
||'''Windows''' users may use any text editor like '''Notepad''' instead of '''gedit'''.  
+
||'''Windows''' users may use any text-editor like '''Notepad''' instead of '''gedit'''.  
  
 
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|-
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|-
 
|-
 
|| 01:06
 
|| 01:06
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||'''OMShell''' is an interactive command line tool.  
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||'''OMShell''' is an interactive '''command line''' tool.  
  
 
|-
 
|-
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|-
 
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|| 01:20
 
|| 01:20
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||It can be used for loading '''classes''' and simulating them.
+
||It can be used for '''load'''ing '''classes''' and simulating them.
  
 
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|-
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|-
 
|-
 
|| 02:03
 
|| 02:03
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||Please save all these code files in one directory for easy access.
+
||Please '''save''' all these code files in one directory for easy access.
  
 
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|-
 
|-
 
|| 02:12
 
|| 02:12
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||To open '''OMShell''' on '''Ubuntu''' Operating System, click on '''Dash Home''' icon at top left in the launcher.
+
||To open '''OMShell''' on '''Ubuntu''' Operating System, click on '''Dash Home''' icon at top left in the '''launcher'''.
  
 
|-
 
|-
 
|| 02:21
 
|| 02:21
−
|| Type '''OMShell''' in the search bar.
+
|| Type '''OMShell''' in the '''search bar'''.
  
 
|-
 
|-
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|-
 
|-
 
|| 02:33
 
|| 02:33
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|| Now, let us learn a few useful commands.
+
|| Now, let us learn a few useful '''command'''s.
  
 
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|-
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|-
 
|-
 
|| 02:47
 
|| 02:47
−
||Note that this file has all the '''commands''' to be used in this tutorial.  
+
||Note that this file has all the '''command'''s to be used in this tutorial.  
  
 
|-
 
|-
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|-
 
|-
 
|| 03:00
 
|| 03:00
−
|| Type '''cd open and close parentheses'''.
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|| Type: '''cd''' open and close parentheses.
  
 
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|-
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|-
 
|-
 
|| 03:11
 
|| 03:11
−
|| This prints the path to current directory.
+
|| This prints the '''path''' to current directory.
  
 
|-
 
|-
 
||03:15
 
||03:15
−
|| Now let us change current directory to the location where you have saved the '''code files'''.
+
|| Now, let us change current directory to the location where you have saved the '''code files'''.
  
 
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|-
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|-
 
|-
 
|| 03:25
 
|| 03:25
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||Type '''cd'''(open and close parentheses) (within double quotes), specify the path. Press '''Enter'''.
+
||Type: '''cd''' open and close parentheses, within double quotes specify the '''path'''. Press '''Enter'''.
  
 
|-
 
|-
 
|| 03:38
 
|| 03:38
−
|| Note that a '''Windows''' path uses '''forward slash''' unlike the '''backward slash''' used in '''Ubuntu'''.  
+
|| Note that a '''Windows path''' uses '''forward slash''' unlike the '''backward slash''' used in '''Ubuntu'''.  
  
 
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|-
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|-
 
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|| 03:51
 
|| 03:51
−
|| Now let us load '''polynomialEvaluatorUsingVectors''' function.
+
|| Now, let us load '''polynomialEvaluatorUsingVectors''' function.
  
 
|-
 
|-
 
|| 03:57
 
|| 03:57
−
||Type '''loadFile''' (within parentheses) (within double quotes) '''polynomialEvaluatorUsingVectors.mo'''.
+
||Type '''loadFile''' within parentheses within double quotes '''polynomialEvaluatorUsingVectors.mo'''.
  
 
|-
 
|-
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|-
 
|-
 
||04:16
 
||04:16
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||This command can be used to load '''class''' or '''model''' files with a file extension of '''.mo'''.
+
||This '''command''' can be used to '''load''' class or '''model''' files with a file extension of '''.mo'''.
  
 
|-
 
|-
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|-
 
|-
 
|| 04:33
 
|| 04:33
−
|| Now let us call this function interactively.
+
|| Now, let us call this function interactively.
  
 
|-
 
|-
 
|| 04:37
 
|| 04:37
−
||Type '''polynomialEvaluatorUsingVectors''' (with an argument of) '''10'''. Press '''Enter'''.
+
||Type: '''polynomialEvaluatorUsingVectors''' with an argument of '''10'''. Press '''Enter'''.
  
 
|-
 
|-
 
|| 04:47
 
|| 04:47
−
|| This command takes an input argument of '''10''' units and displays the result.
+
|| This command takes an '''input argument''' of '''10''' units and displays the result.
  
 
|-
 
|-
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|-
 
|-
 
|| 04:59
 
|| 04:59
−
||Type '''loadFile''' (open and close parentheses) (within double quotes) '''functionTester.mo'''. Press '''Enter'''.
+
||Type: '''loadFile''' open and close parentheses within double quotes '''functionTester.mo'''. Press '''Enter'''.
  
 
|-
 
|-
 
|| 05:12
 
|| 05:12
−
|| Now let us simulate '''functionTester class'''.
+
|| Now, let us simulate '''functionTester class'''.
  
 
|-
 
|-
 
|| 05:16
 
|| 05:16
−
||Type '''simulate''' (within parentheses) '''functionTester''' (comma) '''startTime''' (equals) '''0 stopTime''' (equals) '''1'''. Press '''Enter'''.
+
||Type '''simulate''' within parentheses '''functionTester''' comma '''startTime''' equals '''0 stopTime''' equals '''1'''. Press '''Enter'''.
  
 
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|-
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|-
 
|-
 
||05:35
 
||05:35
−
||Let us plot variable '''z''' from '''functionTester''' class.
+
||Let us '''plot''' variable '''z''' from '''functionTester''' class.
  
 
|-
 
|-
 
|| 05:40
 
|| 05:40
−
|| Type '''plot''' (within parentheses) (within curly braces) '''z''' and press '''Enter'''.  
+
|| Type '''plot''' within parentheses within curly braces '''z''' and press '''Enter'''.  
  
 
|-
 
|-
 
|| 05:50
 
|| 05:50
−
||This command generates a plot of variable '''z''' vs '''time'''.
+
||This '''command''' generates a '''plot''' of variable '''z''' vs '''time'''.
  
 
|-
 
|-
 
|| 05:56
 
|| 05:56
−
|| Now let me go back to the slides.
+
|| Now let me go back to the '''slide'''s.
  
 
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|-
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|-
 
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|| 06:15
 
|| 06:15
−
||'''fill()''' is function used to create an '''array''' with all the elements same. :The syntax for '''fill''' is as shown.  
+
||'''fill()''' is a function used to create an '''array''' with all the elements same. The syntax for '''fill''' is as shown.  
  
 
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|-
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|-
 
|-
 
|| 06:34
 
|| 06:34
−
||'''zeros()''' is a function used to create an '''array''' filled with zeros. : Syntax for '''zeros()''' function is as shown.  
+
||'''zeros()''' is a function used to create an '''array''' filled with zeros. Syntax for '''zeros()''' function is as shown.  
  
 
|-
 
|-
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|-
 
|-
 
|| 07:02
 
|| 07:02
−
|| Now let me demonstrate these functions using '''OMShell'''.  
+
|| Now, let me demonstrate these functions using '''OMShell'''.  
  
 
|-
 
|-
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|-
 
|-
 
||07:09
 
||07:09
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|| Type '''fill'''(within parentheses)''' 5''' (comma) '''2''' (comma) '''2'''.  
+
|| Type: '''fill''' within parentheses ''' 5''' comma '''2''' comma '''2'''.  
  
 
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|-
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|-
 
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|| 07:24
 
|| 07:24
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||The first '''arguments''' represents the element to be filled within the '''array'''.  
+
||The first '''argument''' represents the '''element''' to be filled within the '''array'''.  
  
 
|-
 
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|| 07:30
 
|| 07:30
−
||'''2''' represents the size of first dimension.
+
||'''2''' represents the size of first dimension
  
 
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|-
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|-
 
|-
 
|| 07:57
 
|| 07:57
−
|| Now let us use '''zeros() function''' to create a (two by two) matrix with all its elements '''zero'''.
+
|| Now, let us use '''zeros() function''' to create a two by two matrix with all its elements '''zero'''.
  
 
|-
 
|-
 
|| 08:05
 
|| 08:05
−
|| Type '''zeros''' (within parentheses) '''2''' (comma) '''2''' and press '''Enter'''.
+
|| Type: '''zeros''' within parentheses '''2''' comma  '''2''' and press '''Enter'''.
  
 
|-
 
|-
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|-
 
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|| 08:19
 
|| 08:19
−
||Type '''identity(3)'''.
+
||Type: '''identity(3)'''.
  
 
|-
 
|-
 
|| 08:23
 
|| 08:23
−
||This creates an '''identity''' matrix which is '''3''' (by) '''3''' in its size.
+
||This creates an '''identity''' matrix which is '''3''' by '''3''' in its size.
  
 
|-
 
|-
 
|| 08:29
 
|| 08:29
−
|| We can also perform '''arithmetic operations''' and use '''assignment statements''' in '''OMShell'''.
+
|| We can also perform arithmetic operations and use '''assignment statements''' in '''OMShell'''.
  
 
|-
 
|-
 
|| 08:36
 
|| 08:36
−
||Let us create two matrices and perform '''arithmetic operations''' on them.
+
||Let us create two matrices and perform arithmetic operations on them.
  
 
|-
 
|-
 
|| 08:42
 
|| 08:42
−
|| Type '''a''' (colon) (equals) (within square brackets) '''1''' (comma) '''2''' (semicolon) '''3''' (comma) '''4'''.  
+
|| Type: '''a''' colon equals within square brackets '''1''' comma '''2''' semicolon '''3''' comma '''4'''.  
  
 
|-
 
|-
 
|| 08:54
 
|| 08:54
−
||'''Comma''' is used to separate elements in a row  
+
||Comma is used to separate '''element'''s in a row  
  
 
|-
 
|-
 
|| 08:58
 
|| 08:58
−
||whereas '''semi-colon''' is used to separate rows themselves. Now press '''Enter'''.
+
||whereas semi-colon is used to separate rows themselves. Now press '''Enter'''.
  
 
|-
 
|-
 
|| 09:07
 
|| 09:07
−
|| Type '''b''' (colon) (equals) '''identity (2)'''.
+
|| Type: '''b''' colon equals '''identity of 2'''.
  
 
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|| 09:19
 
|| 09:19
−
|| Now let us perform '''arithmetic operations''' on '''a''' and '''b'''.
+
|| Now, let us perform arithmetic operations on '''a''' and '''b'''.
  
 
|-
 
|-
 
|| 09:24
 
|| 09:24
−
||Type '''a''' (plus) '''b''' and press '''Enter'''.
+
||Type: '''a''' plus '''b''' and press '''Enter'''.
  
 
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|| 09:32
 
|| 09:32
−
|| Type '''a''' (asterisk)''' b'''.
+
|| Type '''a''' asterisk ''' b'''.
  
 
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|-
 
|| 09:42
 
|| 09:42
−
|| Type '''a''' (dot) (asterisk) '''b''' and press '''Enter'''.
+
|| Type: '''a''' dot asterisk '''b''' and press '''Enter'''.
  
 
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|-
 
|-
 
|| 10:41
 
|| 10:41
−
||'''x (colon)(equals) (within square brackets) 3 (comma) 4 (semicolon) 5 (comma) 6'''.
+
||'''x colon equals within square brackets 3 comma 4 semicolon 5 comma 6'''.
  
 
|-
 
|-
 
|| 10:52
 
|| 10:52
−
|| Type '''min (x)''' to obtain the minimum value of '''x'''.
+
|| Type: '''min (x)''' to obtain the minimum value of '''x'''.
  
 
|-
 
|-
 
|| 11:00
 
|| 11:00
−
|| Type '''max (x)''' to obtain the largest value in array '''x'''..
+
|| Type: '''max (x)''' to obtain the largest value in array '''x'''.
  
 
|-
 
|-
 
|| 11:08
 
|| 11:08
−
|| Similarly type '''sum (x)''' to obtain the sum of all elements.
+
|| Similarly, type: '''sum (x)''' to obtain the sum of all elements
−
 
+
 
|-
 
|-
 
||  11:15
 
||  11:15
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|-
 
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|| 12:11
 
|| 12:11
−
|| As an assignment, apply '''abs(), '''ndims()''' and '''size() functions''' to an '''array'''.
+
|| As an assignment, apply '''abs(), '''ndims()''' and '''size()''' functions to an '''array'''.
  
 
|-
 
|-
 
|| 12:19
 
|| 12:19
−
||Secondly, we have used a '''two-dimensional array''' or matrix as an '''argument''' to most of the '''functions'''.  
+
||Secondly, we have used a two-dimensional array or matrix as an '''argument''' to most of the '''functions'''.  
  
 
|-
 
|-
 
|| 12:28
 
|| 12:28
−
||As an assignment, implement all these '''functions''' with '''three-dimensional arrays'''.
+
||As an assignment, implement all these '''functions''' with three-dimensional arrays.
  
 
|-
 
|-
 
|| 12:35
 
|| 12:35
−
|| Watch the video available at the following link:[http://spoken-tutorial.org/ org] /What\_is\_a\_Spoken\_Tutorial
+
|| Watch the video available at the following link:
 +
http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
  
 
|-
 
|-
 
|| 12:39
 
|| 12:39
−
||Its summarises the '''Spoken Tutorial''' project.
+
||It summarizes the '''Spoken Tutorial''' project.
  
 
|-
 
|-
 
|| 12:42
 
|| 12:42
−
|| We conducts workshops using spoken tutorials.Give certificates. Please contact us.
+
|| We conducts workshops using spoken tutorials, give certificates. Please contact us.
  
 
|-
 
|-

Latest revision as of 15:46, 20 August 2018

Time Narration
00:01 Welcome to the Spoken Tutorial on Array Functions and Operations.
00:07 In this tutorial, we are going to learn:

how to use OMShell , how to use array construction functions,

00:17 how to perform arithmetic operations on vectors and matrices,
00:23 how to use array conversion functions.
00:27 To record this tutorial, I am using OpenModelica 1.9.2, Ubuntu Operating System version 14.04 and gedit.
00:40 Windows users may use any text-editor like Notepad instead of gedit.
00:47 To understand and practice this tutorial, you need knowledge of function and array declaration in Modelica.
00:56 Prerequisite tutorials are mentioned on our website. Please go through them.
01:02 Let us learn more about OMShell now.
01:06 OMShell is an interactive command line tool.
01:10 It is a part of OpenModelica.
01:13 OpenModelica compiler can be invoked using commands typed in OMShell.
01:20 It can be used for loading classes and simulating them.
01:25 Functions can also be called in OMShell.
01:29 We shall now use classes named polynomialEvaluatorUsingVectors and functionTester to demonstrate OMShell.
01:38 These classes were discussed in previous tutorials.
01:42 For more information on these classes, please watch the prerequisite tutorials.
01:48 All the commands to be used in this tutorial are provided in a file named OMShell-commands.txt.
01:57 You may locate and download all the code files available on our website.
02:03 Please save all these code files in one directory for easy access.
02:09 Now let me launch OMShell.
02:12 To open OMShell on Ubuntu Operating System, click on Dash Home icon at top left in the launcher.
02:21 Type OMShell in the search bar.
02:25 Click on OMShell icon.
02:28 In Windows, you may find the icon in Start menu.
02:33 Now, let us learn a few useful commands.
02:37 Firstly, go to the location where you saved the text file named OMShell-commands.txt and open it.
02:47 Note that this file has all the commands to be used in this tutorial.
02:52 Hence, you may refer to this file whenever in doubt.
02:57 Now let me switch to OMShell.
03:00 Type: cd open and close parentheses.
03:05 Press Enter to display the result produced on execution of the command.
03:11 This prints the path to current directory.
03:15 Now, let us change current directory to the location where you have saved the code files.
03:22 Let me change directory on my system.
03:25 Type: cd open and close parentheses, within double quotes specify the path. Press Enter.
03:38 Note that a Windows path uses forward slash unlike the backward slash used in Ubuntu.
03:46 Windows users need to be cautious of this fact.
03:51 Now, let us load polynomialEvaluatorUsingVectors function.
03:57 Type loadFile within parentheses within double quotes polynomialEvaluatorUsingVectors.mo.
04:11 Note that F is upper-case in loadFile() command.
04:16 This command can be used to load class or model files with a file extension of .mo.
04:25 Now press Enter.
04:28 If the file is found, OMShell returns true.
04:33 Now, let us call this function interactively.
04:37 Type: polynomialEvaluatorUsingVectors with an argument of 10. Press Enter.
04:47 This command takes an input argument of 10 units and displays the result.
04:55 Let me now load functionTester class.
04:59 Type: loadFile open and close parentheses within double quotes functionTester.mo. Press Enter.
05:12 Now, let us simulate functionTester class.
05:16 Type simulate within parentheses functionTester comma startTime equals 0 stopTime equals 1. Press Enter.
05:32 The simulation is now complete.
05:35 Let us plot variable z from functionTester class.
05:40 Type plot within parentheses within curly braces z and press Enter.
05:50 This command generates a plot of variable z vs time.
05:56 Now let me go back to the slides.
06:01 Array construction functions are used to construct arrays of given size.
06:06 Now let us take a look at a few array construction functions.
06:11 We will also practice them using OMShell.
06:15 fill() is a function used to create an array with all the elements same. The syntax for fill is as shown.
06:25 First argument represents the number which fills the array.
06:29 Remaining arguments represent the size of each dimension.
06:34 zeros() is a function used to create an array filled with zeros. Syntax for zeros() function is as shown.
06:44 Arguments represent the size of each dimension of the array.
06:50 identity() function creates an identity matrix. It takes one argument that represents the size of both dimensions.
07:02 Now, let me demonstrate these functions using OMShell.
07:06 Let me go back to OMShell.
07:09 Type: fill within parentheses 5 comma 2 comma 2.
07:16 This command generates a two by two matrix with all its elements being 5.
07:24 The first argument represents the element to be filled within the array.
07:30 2 represents the size of first dimension
07:34 and the third argument 2, represents the size of second dimension.
07:40 Now press Enter.
07:43 The result is as expected.
07:46 Elements with one set of curly braces represent a row.
07:52 Hence this matrix has two rows and two columns.
07:57 Now, let us use zeros() function to create a two by two matrix with all its elements zero.
08:05 Type: zeros within parentheses 2 comma 2 and press Enter.
08:13 The result is as expected.
08:16 Let us now try identity function.
08:19 Type: identity(3).
08:23 This creates an identity matrix which is 3 by 3 in its size.
08:29 We can also perform arithmetic operations and use assignment statements in OMShell.
08:36 Let us create two matrices and perform arithmetic operations on them.
08:42 Type: a colon equals within square brackets 1 comma 2 semicolon 3 comma 4.
08:54 Comma is used to separate elements in a row
08:58 whereas semi-colon is used to separate rows themselves. Now press Enter.
09:07 Type: b colon equals identity of 2.
09:15 This generates a 2 by 2 identity matrix.
09:19 Now, let us perform arithmetic operations on a and b.
09:24 Type: a plus b and press Enter.
09:29 This performs matrix addition.
09:32 Type a asterisk b.
09:36 This performs matrix multiplication. Press Enter.
09:42 Type: a dot asterisk b and press Enter.
09:49 This performs element-wise multiplication of the two matrices.
09:55 Note that it is not necessary to define data-types of variables used in OMShell.
10:02 Now let me switch back to the slides.
10:06 Reduction functions take array as input and return scalar as output.
10:13 min() is a function which returns the smallest value in an array.
10:19 Similarly, max() function returns the largest value in an array. sum() returns the sum of all elements and product() returns the product of all elements.
10:33 Let me switch to OMShell to demonstrate these functions.
10:38 Let me create a new matrix.
10:41 x colon equals within square brackets 3 comma 4 semicolon 5 comma 6.
10:52 Type: min (x) to obtain the minimum value of x.
11:00 Type: max (x) to obtain the largest value in array x.
11:08 Similarly, type: sum (x) to obtain the sum of all elements
11:15 and product (x) to obtain the product of individual elements min array x.
11:23 Let me go back to the slides once again.
11:27 Let us now discuss various other functions that take an array as input.
11:33 abs() is a function which returns an array with the absolute values of all its elements.
11:40 size() returns a vector with the size of each dimension.
11:45 ndims() returns the number of dimensions in an array.
11:51 This brings us to the end of this tutorial.
11:54 In this tutorial, we used OMShell to interactively demonstrate array functions.
12:01 These functions are part of Modelica language specification.
12:05 Hence, they may be used while writing classes in OMEdit as well.
12:11 As an assignment, apply abs(), ndims() and size() functions to an array.
12:19 Secondly, we have used a two-dimensional array or matrix as an argument to most of the functions.
12:28 As an assignment, implement all these functions with three-dimensional arrays.
12:35 Watch the video available at the following link:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

12:39 It summarizes the Spoken Tutorial project.
12:42 We conducts workshops using spoken tutorials, give certificates. Please contact us.
12:48 If you have questions in this spoken tutorial, please visit the webpage mentioned.
12:54 We coordinate coding of solved examples of popular books. Please contact us.
13:00 We help migrate commercial simulator labs to OpenModelica.
13:06 Spoken Tutorial Project is funded by NMEICT, MHRD Government of India.
13:14 We thank the development team of OpenModelica for their support. Thank you.

Contributors and Content Editors

Jyotisolanki, Pratik kamble, Sandhya.np14

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