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{| border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
|00:01
| Hello Friends. Welcome to the tutorial on "'''Plotting data '''".

|-
| 00:06
| In this tutorial, we will learn about

Define a '''list''' of '''numbers'''.

|-
| 00:12
| Perform '''element-wise''' squaring of the list.

|-
| 00:16
| '''Plot data points'''.

and '''Plot errorbars'''.

|-
| 00:21
| To record this tutorial, I am using

'''Ubuntu Linux 14.04''' operating system

|-
| 00:29
| '''Python 3.4.3'''

'''IPython 5.1.0'''

|-
| 00:36
| To practise this tutorial, you should know how to

run basic '''Python '''commands on the '''ipython console'''

|-
| 00:44
| Use '''Plots''' interactively

|-
| 00:47
| Embellish a '''plot'''
.
If not, see the relevant '''Python '''tutorials on this website.

|-
| 00:56
| Let us first open the '''Terminal '''by pressing '''Ctrl+Alt+T '''keys simultaneously.

Now, type '''ipython3''' and press '''Enter'''.

|-
| 01:10
| Let us initialise the '''pylab''' package.

Type '''%pylab '''and press''' Enter.'''

|-
| 01:20
| Let us see an example for plotting the data related to a Simple Pendulum.

|-
| 01:26
| For a '''simple pendulum L''' is '''directly proportional''' to the '''square''' of '''time T'''.

We will be '''plotting L''' and '''T square values'''.

|-
| 01:38
| Let us use the data shown here for plotting.

|-
| 01:43
| First let us initiate ''''l'''' and ''''t' values'''.

|-
| 01:48
| We initiate them as '''sequence''' of '''values'''. This is also called as '''List'''.

|-
| 01:56
| Type '''l '''''equal to ''within square brackets ''values ''and press''' Enter'''

|-
| 02:06
| '''t '''''equal to ''within square brackets the ''values ''and press''' Enter'''

|-
| 02:15
| Now we will obtain '''square''' of '''t '''by using '''function square'''.

|-
| 02:21
| Type '''tsquare=square '''within parentheses''' t '''and press''' Enter'''

|-
|02:33
| Now type '''tsquare''' and press '''Enter'''

|-
|02:39
| We see the values of '''array tsquare'''

|-
|02:44
| Now to '''plot L versus T square''', we will simply type

'''plot '''within parentheses''' l '''''comma '''''tsquare '''''comma'' within single quotes '''dot '''and press''' Enter '''

|-
| 03:01
| We see the required plot.

|-
| 03:05
| You can also specify ''''o'''' for '''filled circles'''.

|-
| 03:10
| For this let us clear the '''plot''' first.

Type '''clf parentheses Enter'''

|-
| 03:20
| So the plot is clear now.

|-
| 03:24
| Now type,

'''plot '''within parentheses''' l '''''comma '''''tsquare '''''comma'' within single quotes '''o '''and press''' Enter'''

|-
| 03:36
| We see the plot with filled circles.

|-
| 03:40
| Pause the video. Try this exercise and then resume the video.

'''Plot''' the given '''experimental data''' with '''large dots'''. The '''data''' is on your screen.

|-
| 03:55
| Use the error data given here for plotting.

|-
| 03:59
| We shall again '''initialize''' the '''sequence values''' in the same manner as we did for '''l''' and '''t'''.

|-
| 04:07
| So, type '''delta underscore l equal to''' within square bracket the ''values ''and press '''Enter'''

|-
| 04:20
| '''delta underscore t '''within square bracket the '' values ''and press '''Enter'''

|-
| 04:29
| Now to plot '''L''' versus '''T''' square with an '''error bar,''' we use the '''function''' '''errorbar()'''.

|-
| 04:37
| So type, '''errorbar''' within parentheses '''l '''''comma '''''tsquare '''''comma '''''xerr '''''equalto '''''delta underscore l '''''comma '''''y underscore err '''''equalto '''''delta underscore t '''''comma '''''fmt '''equal to within single quotes '''bo '''

and press '''Enter'''

|-
| 05:08
| We see the plot '''L''' versus '''T square''' with an '''error bar.'''

|-
|05:14
| You can explore other options of '''errorbar''' using the '''documentation''' of '''errorbar'''.

That is, '''errorbar ''question mark'''''

|-
| 05:27
| Pause the video. Try this exercise and then resume the video.

|-
| 05:33
|
'''Plot''' the given '''experimental data '''with '''small dots'''.

Also include the '''error''' in your '''plot'''.

|-
| 05:42
| Use the data given here for plotting.

|-
| 05:47
| This brings us to the end of this '''tutorial'''. In this '''tutorial''', we have learned to,

Declare a '''list''' of '''numbers''' using the '''function''' '''array'''.

|-
| 05:59
| Perform '''element-wise''' '''squaring''' using the '''square''' '''function'''.

|-
| 06:04
| Use various '''options''' available for '''plotting''' like '''dots''',''' lines''' etc.

|-
| 06:11
| '''Plot experimental data''' such that we can also represent '''error''' by using the '''errorbar() function'''.

|-
| 06:20
| Here are some self assessment questions for you to solve.

|-
| 06:25
| '''Square''' the following '''sequence''' distance underscore values ''equal to within square brackets'' '''2.1 comma 4.6 comma 8.72 comma 9.03'''

|-
| 06:39
| Plot L versus T in '''red pluses'''.

|-
| 06:44
| And the answers,

To square a sequence of values, we use the '''function square'''.

|-
| 06:51
| So '''square''' ''within parentheses'' '''distance underscore''' ''values''

|-
| 06:57
| Answer to the second question

We pass an additional '''argument''' stating the desired parameter

|-
| 07:04
| So '''plot''' within parentheses '''L''' ''comma'' '''T''' ''comma'' within single quotes '''r''' ''plus'' for red '''pluses'''

|-
| 07:16
| Please post your timed queries in this forum.

|-
| 07:21
| Please post your general queries on Python in this forum.

|-
| 07:27
| FOSSEE team coordinates the TBC project.

|-
| 07:31
| Spoken-tutorial is funded by NMEICT, MHRD, Govt. of India.

For more details, visit this website.

|-
|07:42
| This is from IIT Bombay signing off.

Thank You

|}

Python-3.4.3/C2/Plotting-Data/English-timed - Revision history

PoojaMoolya: Created page with " {| border=1 | '''Time''' | '''Narration''' |- |00:01 | Hello Friends. Welcome to the tutorial on "'''Plotting data '''". |- | 00:06 | In..."