Sandhya.np14 at 16:07, 12 June 2019

2019-06-12T16:07:33Z

Pratik kamble: Created page with "{| border=1 | '''Time''' |'''Narration''' |- |00:01 |Hello Friends. Welcome to the spoken tutorial on '''Subplots'''. |- | 00:06 | At the end of this tutorial, you will be..."

2019-05-30T06:13:17Z

Created page with "{| border=1 | '''Time''' |'''Narration''' |- |00:01 |Hello Friends. Welcome to the spoken tutorial on '''Subplots'''. |- | 00:06 | At the end of this tutorial, you will be..."

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{| border=1
| '''Time'''
|'''Narration'''

|-
|00:01
|Hello Friends. Welcome to the spoken tutorial on '''Subplots'''.

|-
| 00:06
| At the end of this tutorial, you will be able to create and switch between '''subplots'''.

|-
| 00:14
|To record this tutorial, I am using

'''Ubuntu Linux 14.04''' operating system

'''Python 3.4.3'''

'''IPython 5.1.0'''

|-
| 00:29
|To practise this tutorial, you should know how to

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

Use '''Plots''' interactively

Embellish a '''plot'''

If not, see the pre-requisite '''Python '''tutorials on this website.

|-
| 00:48
|Let us first open the '''Terminal '''by pressing '''Ctrl+Alt+T '''keys simultaneously.
Now, type '''ipython3''' and press '''Enter'''.

|-
|01:01
|Let us initialise the '''pylab package'''. Type '''percentage pylab '''and press''' Enter'''

|-
| 01:10
| To compare two '''plots''' we draw the '''plots''' in the same '''plotting area.'''

|-
| 01:15
| Let us now create two '''plots'''- a '''cosine plot''' and an '''exponential curve''' in the same '''plotting area'''.

|-
| 01:24
| Type

'''x equals to linspace''' inside '''brackets 0 comma 50 comma 500 '''and press '''Enter'''.

'''plot''' inside '''brackets x comma cos(x)'''

|-
| 01:45
| Type

'''y equals to linspace''' inside '''brackets 0 comma 5 comma 100.'''
'''plot''' inside '''brackets y comma y square.'''

|-
| 02:04
| Here the two '''plots''' have different regular '''axes.''' So we cannot draw '''overlaid plots. '''

|-
| 02:13
| In such cases we can draw '''subplots'''.

|-
| 02:17
| We use '''subplot command''' to accomplish this.

Type

'''clf()'''

'''subplot''' inside the '''brackets 2 comma 1 comma 1'''

|-
|02:33
| We can see the first '''subplot. The '''subplot command''' takes three '''arguments.'''

|-
| 02:40
|The first '''argument''' is the number of '''rows''' of '''subplots''' that must be created.

Here the first '''argument''' is 2, to split the '''plot horizontally'''.

|-
| 02:53
|The second '''argument''' is the number of '''columns''' of '''subplots''' that must be created.
Here the second '''argument '''is 1. So '''plot''' will not split '''vertically.'''

|-
| 03:07
|The last '''argument''' specifies the '''serial number '''for the''' subplot'''.
Here we passed 1 as the '''argument''', which creates the '''upper subplot'''

|-
| 03:19
| If we execute the '''subplot command''' as

'''subplot''' inside the '''brackets 2 comma 1 comma 2''' the '''lower subplot''' is created.

|-
| 03:34
| Here, we can see two '''subplots'''.

|-
| 03:38
| Now we can draw '''plots''' in each of the '''subplot area''' using the '''plot command'''.

Type

'''subplot''' inside '''brackets 2 comma 1 comma 1'''

'''plot''' inside '''brackets x comma cos(x)'''

|-
| 04:00
| Now type

'''subplot''' inside '''brackets 2 comma 1 comma 2 '''

'''plot y comma y square'''

|-
|04:16
| This created two '''plots''' one in each of the''' subplot''' area. The top '''subplot''' holds a '''cosine curve''' And the bottom '''subplot''' holds a '''parabola'''.

|-
| 04:29
|It is clear from the two '''subplots''' that both have different '''regular axes'''.

|-
| 04:35
|For the '''cosine curve, x-axis''' varies from 0 to 50 and '''y-axis''' varies from '''minus '''1 to 1.

|-
| 04:46
|For the '''parabolic curve, x-axis''' varies from 0 to 5 and '''y-axis''' varies from 0 to 25.

|-
| 04:57
| Now clear the plot window

|-
| 05:00
| Pause the video. Try this exercise and then resume the video

|-
| 05:05
| '''Pressure, Volume '''and''' Temperatures '''are held by the '''equation Pv equals to nRT''' where '''nR''' is a '''constant'''.

|-
| 05:16
| Assume '''nR equals to 0.01 Joules per Kelvin''' and '''T equals to 200K'''. '''V''' can be in the '''range''' from '''21cc to 100cc'''.

|-
| 05:29
| Draw two different''' plots '''as''' subplots''':

'''Pressure v/s Volume plot '''and

'''Pressure v/s Temperature plot'''.

|-
|05:39
| Switch to the '''terminal''' for the solution.

|-
| 05:43
| To start with, we have been given the '''range''' of '''Volume''' from which we can define the variable '''v.'''

|-
| 05:51
| '''v equals to linspace''' inside '''brackets 21 comma 100 comma 500'''

|-
| 06:03
| We can create first '''subplot''' and draw '''Pressure''' v/s '''Volume''' '''graph '''using this '''v'''.

'''subplot(2 comma 1 comma 1) '''

'''plot(v comma 2 point 0 by v)'''

|-
| 06:24
| We know that '''nRT''' is a '''constant''' which is equal to 2.0

since '''nR''' = equals to 0.01 '''Joules per Kelvin''' and '''T''' equals to 200 '''Kelvin '''

|-
| 06:38
| Now we can create the second '''subplot''' and draw the '''Pressure''' v/s '''Temperature plot''' as follows

'''subplot(2 comma 1 comma 2)'''

'''plot(200 comma 2 point 0 divided by v)'''

|-
| 07:02
| We have an error now, telling '''x''' and '''y dimensions''' don't match.

|-
| 07:08
| So we will create same number of '''points''' for '''temperature.'''

|-
| 07:14
| Type

'''t equals to linspace''' inside '''brackets 200 comma 200 comma 500. '''

|-
| 07:27
| Now, we have 500 values in '''t '''and each with the value 200 '''Kelvin'''.

|-
| 07:35
| '''Plotting''' this data, we get the required '''plot. '''

'''plot''' inside '''brackets t comma 2 point 0 divided by v'''

|-
| 07:48
| We can see two '''subplots''' of '''Pressure v/s Volume''' and '''Pressure v/s Temperature''' respectively.

|-
| 07:56
| This brings us to the end of this tutorial.

In this tutorial, we have learnt to create '''subplots '''and to '''switch''' between them.

|-
| 08:08
| Here are some self assessment questions for you to solve.

|-
| 08:12
|1.Which of the following is correct?

'''subplot''' inside '''brackets numRows comma numCols, plotNum '''

'''subplot''' inside '''brackets numRows comma numCols '''

'''subplot''' inside '''brackets numCols comma numRows'''

|-
| 08:36
| And the answer is first option.

1.The''' subplot command''' takes three '''arguments''' namely the number of '''rows''', number of '''columns''' and the '''plot number'''.

|-
| 08:48
| Please post your timed queries in this forum.

|-
| 08:53
| Please post your general queries on Python in this forum.

|-
| 08:59
|The FOSSEE team coordinates the TBC project.

|-
| 09:04
| Spoken-tutorial is funded by NMEICT, MHRD, Govt. of India.For more details, visit this website.

|-
| 09:15
| This is Usha from IIT Bombay signing off. Thank You.

|}

Python-3.4.3/C2/Subplots/English-timed - Revision history

Sandhya.np14 at 16:07, 12 June 2019

Pratik kamble: Created page with "{| border=1 | '''Time''' |'''Narration''' |- |00:01 |Hello Friends. Welcome to the spoken tutorial on '''Subplots'''. |- | 00:06 | At the end of this tutorial, you will be..."