Sandhya.np14 at 14:38, 25 February 2015

2015-02-25T14:38:50Z

Sandhya.np14 at 14:36, 25 February 2015

2015-02-25T14:36:24Z

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Gaurav at 11:30, 10 July 2014

2014-07-10T11:30:27Z

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PoojaMoolya at 11:31, 6 March 2014

2014-03-06T11:31:49Z

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Sneha at 10:38, 9 April 2013

2013-04-09T10:38:49Z

Sneha: Created page with ' {|"border-spacing:0;" ! Visual Cue ! Narration |- |00.02 | | Welcome to the spoken tutorial on iterative calculations using Scilab. |- | 00.07 | | I am using scilab ver…'

2013-04-09T10:38:17Z

Created page with ' {|"border-spacing:0;" ! Visual Cue ! Narration |- |00.02 | | Welcome to the spoken tutorial on iterative calculations using Scilab. |- | 00.07 | | I am using scilab ver…'

New page

{|"border-spacing:0;"

! Visual Cue

! Narration

|-

|00.02

| | Welcome to the spoken tutorial on iterative calculations using Scilab.

|-

| 00.07

| | I am using scilab version 5.2 in Mac operating system ,

|-

| 00.11

| | but these calculations should work in other versions and also in Scilab that runs in linux and windows.

|-

| 00.18

| | I will use the code available in the file iteration.sce

|-

|00.23

|| I have opened this file using Scilab editor, which I plan to use only as an editor.

|-

| 00.29

|| Let us create a vector using the colon operator i is equal to 1 colon 5.

|-

| 00.38

| |creates a vector from 1 to 5, in increments of 1.

|-

|00.42

| | In this command i is equal to 1 colon 2 colon 5,

|-

| 00.52

| | we see that the middle argument of 2 indicates the increment.

|-

| 00.56

| | 1 is the first argument where the vector starts. I cannot go beyond 5.

|-

| 01.01

| |It can be equal to 5, however.

|-

| 01.04

| | Note that if the ending argument changes to 6 the result remains the same.

|-

|01.10

| | It is not difficult to explain this behaviour.

|-

|01.13

| | Can you think for a moment why this happens?

|-

| 01.16

|| We will now demonstrate the use of the for statement to perform iterative calculations.

for i is equal to 1 colon 2 colon 7 disp i end of for loop.

|-

| 01.29

| |I will cut this paste in scilab console press enter.

|-

| 01.35

| |This code prints out i, as we go through the loop.

|-

| 01.37

| |The display is due to the command disp - the passed argument is displayed.

|-

| 01.42

| |Recall that the for loop is used for integer values.

|-

| 01.45

| | In this case, four integer values, namely, 1, 3, 5 and 7 are displayed.

|-

| 01.53

| |The number of times the iterations take place is known as priori in for loops.

|-

|01.57

| | In the rest of this tutorial, we will stick to the default increment of 1.

|-

| 02.01

| |Let us begin with the loop that displays i equal to 1 to 5.

|-

| 02.10

| | We will modify this code by introducing the break statement.

|-

|02.19

| Note that i is displayed only up to 2.

|-

|02.22

| | The iteration is not carried out till the last value of i, namely, 5.

|-

|02.27

| | When i is equal to 2, the if block is executed for the first time.

|-

| 02.31

| | The break command, however, terminates the loop.

|-

| 02.34

|| If we want to get out of a loop when some intermediate condition is satisfied, we can use the break statement.

|-

| 02.41

| | Note that "i is equal to 2" statement uses the "equal to" sign twice.

|-

| 02.46

| | This is the standard way to compare the equality in programming languages.

|-

|02.51

| | The result of this comparison statement is a boolean: true or false.

|-

| 02.56

| | We will introduce the continue statement here paste press enter

|-

| 03.06

|| This results in i getting displayed only for 4 and 5.

|-

| 03.11

| | For i less than or equal to 3, as given by the i less than or equal to 3 statement, nothing happens.

|-

| 03.18

| | The continue statement makes the program skip the rest of the loop.

|-

| 03.22

| Unlike the break statement, however, it does not exit the loop.

|-

| 03.25

| | The parameter i is incremented and all the calculations of the loop are executed for the new i.

|-

| 03.33

| | We take a small break and show how to get help for operators of the type less than or equal to.

|-

| 03.38

| |Let us type less than or equal to with help

|-

| 03.47

|| This opens the scilab help browser.

|-

| 03.52

|| We see that the help is available under the option less.

|-

| 03.56

| | So now after closing this we type help less

|-

|04.07

|| We see the required help instructions here. I will close this.

|-

|04.12

| | The for statement in Scilab is more powerful than in programming languages.

|-

| 04.16

| | For example, let us perform a loop over a vector:

|-

| 04.25

| | This script displays all values of v.

|-

| 04.28

| | Until now we have been displaying only the variables.

|-

| 04.32

| | We can indeed display the result of a calculation as well.

|-

| 04.35

| | The following code displays the square of the numbers.

|-

|04.45

| | We have spent quite a bit of time explaining the for loop.

|-

| 04.48

| | Let us now move on to the while loops.

|-

| 04.51

| | The while statement allows us to perform a loop when a boolean expression is true

|-

| 04.56

| | At the beginning of the loop, if the expression is true,

|-

| 04.59

| |the statements in the body of the while loop are executed.

|-

| 05.02

| | If the program is written well, the expression becomes false and the loop is ended.

|-

| 05.08

|| Now let us see an example for the while loop:

|-

|05.15

| | The values of i, from 1 to 6 are displayed.

|-

|05.19

|| Break and continue statements inside the while loop work exactly as they did in the for loop, as we demonstrate using break:

|-

|05.33

| | We can see that the moment i becomes equal to 3, the program exits the loop, thanks to the break statement.

|-

| 05.40

|| You can also try the example for continue statement in while loop.

|-

| 05.44

| | This brings us to the end of this spoken tutorial on iterative calculations using Scilab.

|-

| 05.51

|| Spoken Tutorials are part of the Talk to a Teacher project, supported by the National Mission on Education through ICT.

|-

| 05.57

| | More information on the same is available at the following link [http://spoken-tutorial.org/NMEICT-Intro].

|-

| 06.00

| |Thanks for joining.Good bye.

|}

@@ Line 13: / Line 13: @@
 | 00:07
-| | I am using '''Scilab version 5.2''' in '''Mac operating system''' ,
+| | I am using '''Scilab version 5.2''' in '''Mac operating system'''
 |-
@@ Line 37: / Line 37: @@
 | 00:29
-|| Let us create a vector using the colon operator. 'i' is equal to 1 colon 5
+|| Let us create a vector using the colon operator. 'i' is equal to 1 colon 5,
 |-
@@ Line 49: / Line 49: @@
 |00:42
-| | In this command,  'i' is equal to 1 colon 2 colon 5,
+| | In this command,  'i' is equal to 1 colon 2 colon 5.
 |-

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Scilab/C2/Iteration/English-timed - Revision history

Sandhya.np14 at 14:38, 25 February 2015

Sandhya.np14 at 14:36, 25 February 2015

Gaurav at 11:30, 10 July 2014

PoojaMoolya at 11:31, 6 March 2014

Sneha at 10:38, 9 April 2013

Sneha: Created page with ' {|"border-spacing:0;" ! Visual Cue ! Narration |- |00.02 | | Welcome to the spoken tutorial on iterative calculations using Scilab. |- | 00.07 | | I am using scilab ver…'