Difference between revisions of "Python/C2/Plotting-the-data/English-timed"

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(Created page with '{| border=1 !Visual Cue !Narration |- | 0:01 | Hello Friends and Welcome to this tutorial on "Plotting Experimental data". |- | 0:05 | At the end of this tutorial, you will be a…')
 
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|plot within bracket L comma Tsquare comma dot in single quote  
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|plot within bracket L comma Tsquare comma within single quote dot
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| dot here displays the plot in a dot pattern.  
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|Here single quote  dot displays the plot in a dot pattern.  
  
 
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| For this let us clear the plot first.
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| For this let us clear the first plot .
  
 
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|Type clf bracket enter
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|Type clf closing  bracket and hit enter
  
 
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|Type plot within bracket L comma Tsquare comma o in single quote enter
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|Then Type plot within bracket L comma Tsquare comma within single quote o hit  enter now to clear the bracket type clf closing bracket
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  to clear the bracket type clf bracket
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| Its given in delta underscore L and delta underscore T
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| Its given in delta underscore delta L and delta underscore T
  
 
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| Now to plot L vs T square with an error bar we use the function <tt>errorbar()</tt>.
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| Now to plot L vs T square with an error bar we use the function errorbar() .
  
 
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|Before plotting the data we need to get the data of delta underscore L and delta underscore T
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|Before plotting the data we need to get the data of delta L and delta T
  
 
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|delta underscore L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01
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|delta L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01
  
 
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|delta underscore T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]
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|delta T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]
  
 
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|Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=bo in single quote  
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|Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt= in single quote bo
  
 
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| This gives a plot with error bar for x and y axis.
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| This gives a plot with error bar of x and y axis.
  
 
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|similarly we can draw the same error bar with small red dots just change the parameters of fmt to with in single quote r dot.
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|similarly we can draw the same error bar with small red dots just change the parameters of fmt to r dot.
  
 
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|Type clf()
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|Type clf() to clear the plot
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errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=within r.
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errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=in single quote  r and hit enter.
  
 
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| The data is on your screen delta s delta n
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| The data is on your screen for  delta s delta n
  
 
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| In this tutorial, we have learnt to,
 
| In this tutorial, we have learnt to,
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1. to declare a sequence of numbers using the function <tt>array</tt>.
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1. to declare a sequence of numbers using the function array.
  
 
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| 2. to perform elementwise squaring using the <tt>square</tt> function.
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| 2. to perform elementwise squaring using the square function.
  
 
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| 4. to Plot experimental data such that we can also represent error by using the <tt>errorbar()</tt> function.
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| 4. to Plot experimental data such that we can also represent error by using the errorbar() function.
  
 
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| 1. Square the following sequence.<br/> <nowiki>distance underscore values=wthin square bracket 2.1 comma 4.6 comma 8.72 comma 9.03 </nowiki>
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| 1. Square the following sequence.br distance underscore values=within square bracket 2.1 comma 4.6 comma 8.72 comma 9.03  
  
 
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|1. To square a sequence of values, we use the function <tt>square</tt>
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|1. To square a sequence of values, we use the function square
  
 
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| Type square within bracket distance underscore values
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|So that we have to Type square within bracket distance underscore values
  
 
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Revision as of 11:48, 11 March 2013

Visual Cue Narration
0:01 Hello Friends and Welcome to this tutorial on "Plotting Experimental data".
0:05 At the end of this tutorial, you will be able to,
  1. Define a list of numbers.
  2. perform element wise squaring of the list.
  3. Plot data points.
  4. plot errorbars.
0:18 One needs to be familiar with the concepts of plotting mathematical functions in Python.
0:23 We will use data from a Simple Pendulum Experiment to illustrate.
0:30 As we know for a simple pendulum, length L is directly proportional to the square of time T.
0:37 We shall be plotting L and T square values.
0:40 First we will have to initiate L and T values.
0:44 We initiate them as sequence of values.
0:47 We define a sequence by comma separated values inside two square brackets.
0:52 This is also called a List.
0:54 Let's create two sequences L and t.
0:58 L = [0.1, 0.2, 0.3, 0.4, 0.5,0.6, 0.7, 0.8, 0.9]
1:10 T= [0.69, 0.90, 1.19,1.30, 1.47, 1.58, 1.77, 1.83, 1.94]
1:29 To obtain the square of sequence T we will use the function square with argument T.
1:36 This is saved into the variable Tsquare.
1:38 So type Tsquare=square withinbracket T
1:55 Tsqaure enter
2:00 Now to plot L versus T square, we will simply type
2:07 plot within bracket L comma Tsquare comma within single quote dot
2:21 Here single quote dot displays the plot in a dot pattern.
2:26 You can also specify 'o' for big dots.
2:31 For this let us clear the first plot .
2:34 Type clf closing bracket and hit enter
2:39 Then Type plot within bracket L comma Tsquare comma within single quote o hit enter now to clear the bracket type clf closing bracket
3:01 Let us move further.
3.03 For any experimental there is always an error in measurements due to instrumental and human constraints.
3:10 Now we shall try and take these errors into account in our plots .
3:17 Pause the video here, try out the following exercise and resume the video.
3:21 Plot the given experimental data with large dots.
3:25 The data is on your screen.
3:29 Its given in delta underscore delta L and delta underscore T
3:37 We shall again initialize the sequence values in the same manner as we did for L and T.
3:48 Now to plot L vs T square with an error bar we use the function errorbar() .
4:00 Before plotting the data we need to get the data of delta L and delta T
4:05 delta L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01
4:25 delta T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]
4:40 Now use the error function
4:44 Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt= in single quote bo
5:32 This gives a plot with error bar of x and y axis.
5:36 The dots are of blue color.
5:38 The parameters xerr and yerr are error on x and y axis and fmt is the format of the plot.
5:46 similarly we can draw the same error bar with small red dots just change the parameters of fmt to r dot.
5:59 Type clf() to clear the plot

errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=in single quote r and hit enter.

6:24 you can explore other options to errorbar using the documentation of errorbar.
6:30 errorbar? on terminal
6:38 Pause the video here, try out the following exercise and resume the video.
6:44 Plot the given experimental data with small dots and also include the error in your plot.
6:51 The data is on your screen for delta s delta n
7:00 This brings us to the end of the end of this tutorial.
7:03 In this tutorial, we have learnt to,

1. to declare a sequence of numbers using the function array.

7:09 2. to perform elementwise squaring using the square function.
7:14 3. to use the various options available for plotting like dots,lines.
7:20 4. to Plot experimental data such that we can also represent error by using the errorbar() function.
7:28 Here are some self assessment questions for you to solve
7:32 1. Square the following sequence.br distance underscore values=within square bracket 2.1 comma 4.6 comma 8.72 comma 9.03
7:44 2. Plot L versus T in red pluses.
7:52 And the answers,
7:55 1. To square a sequence of values, we use the function square
8:02 So that we have to Type square within bracket distance underscore values
8:09 2. We pass an additional argument stating the desired parameter
8:14 Type plot within bracket L comma T comma within single quote r+
8:24 Hope you have enjoyed this tutorial and found it useful.
8:27 Thank You!

Contributors and Content Editors

Gaurav, Minal, PoojaMoolya, Sneha

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