Difference between revisions of "Python-3.4.3/C2/Saving-plots/English-timed"

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(Created page with " {| border=1 | '''Time''' | '''Narration''' |- |00:01 | Hello Friends. Welcome to the tutorial on "'''Saving Plots'''". |- | 00:06 | At the end of this tutorial, you will b...")
 
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|-
 
|-
 
|00:01
 
|00:01
−
| Hello Friends. Welcome to the tutorial on "'''Saving Plots'''".  
+
| Hello friends! Welcome to the tutorial on "'''Saving Plots'''".  
  
 
|-
 
|-
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| At the end of this tutorial, you will be able to -
 
| At the end of this tutorial, you will be able to -
  
−
Save plots using '''savefig() function'''.
+
save '''plot'''s using '''savefig() function''',
  
−
Save plots in different formats.
+
save plots in different '''format'''s.
  
 
|-
 
|-
 
| 00:15
 
| 00:15
−
|To record this tutorial, I am using  
+
|To record this tutorial, I am using:
  
−
'''Ubuntu Linux 14.04''' operating system
+
'''Ubuntu Linux 14.04''' operating system,
  
−
'''Python 3.4.3'''
+
'''Python 3.4.3''',
  
 
'''IPython 5.1.0'''
 
'''IPython 5.1.0'''
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|-
 
|-
 
| 00:28
 
| 00:28
−
| To practise this tutorial, you should know how to use '''Plot Command interactively.
+
| To practise this tutorial, you should know how to use '''Plot''' command interactively.
  
−
If not, see the prerequisite '''Python''' tutorials on this website.
+
If not, see the prerequisite '''Python tutorials''' on this website.
  
 
|-
 
|-
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|-
 
|-
 
| 00:54
 
| 00:54
−
| Let us initialise the '''pylab''' package.
+
| Let us initialise the ''''pylab' package'''.
−
Type '''percentage pylab '''and press''' Enter'''
+
Type '''percentage pylab '''and press''' Enter'''.
  
 
|-
 
|-
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|-
 
|-
 
| 01:14
 
| 01:14
−
| To do this, type,
+
| To do this, type:
  
 
'''x equals to linspace(minus 3 star pi comma 3 star pi comma 100) '''in the '''console'''.
 
'''x equals to linspace(minus 3 star pi comma 3 star pi comma 100) '''in the '''console'''.
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|-
 
|-
 
| 01:28
 
| 01:28
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| Let us '''plot''' a '''sine curve''' for the points stored in '''variable x'''
+
| Let us '''plot''' a '''sine curve''' for the points stored in '''variable x'''.
  
 
|-
 
|-
 
| 01:33
 
| 01:33
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| Type '''plot(x comma sin(x)) '''in the '''console''' and press '''Enter. '''
+
| Type: '''plot(x comma sin(x)) '''in the '''console''' and press '''Enter. '''
  
 
Don't close the '''plot window''' for rest of the tutorial.
 
Don't close the '''plot window''' for rest of the tutorial.
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|-
 
|-
 
| 01:47
 
| 01:47
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| Here you can see we have made a very basic '''sine plot'''. Now let us see how to save the '''plot.'''
+
| Here you can see we have made a very basic '''sine plot'''. Now let us see how to '''save''' the '''plot.'''
  
 
|-
 
|-
 
| 01:54
 
| 01:54
−
| For saving the plot, we will use the '''savefig() function.'''  
+
| For saving the plot, we will use the ''''savefig()' function.'''  
  
 
Syntax: '''savefig(fname)'''
 
Syntax: '''savefig(fname)'''
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|-
 
|-
 
| 02:05
 
| 02:05
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| Type '''savefig('sine.png') '''and press''' Enter'''.
+
| Type: '''savefig('sine.png') '''and press''' Enter'''.
  
 
|-
 
|-
 
| 02:12
 
| 02:12
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| This saves the file in '''present working directory'''.
+
| This saves the file in present '''working directory'''.
  
 
|-
 
|-
 
| 02:16
 
| 02:16
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| The characters after the '''dot '''in the filename is the '''extension'''. It determines the format in which you want to save the file.
+
| The characters after the '''dot '''in the filename is the '''extension'''. It determines the '''format''' in which you want to '''save''' the file.
  
 
|-
 
|-
 
| 02:27
 
| 02:27
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| To check current working directory, Type '''pwd '''in the '''console''' and press '''Enter'''
+
| To check the current working directory, type '''pwd '''in the '''console''' and press '''Enter'''.
  
 
|-
 
|-
 
| 02:34
 
| 02:34
−
| To save the file in a different directory, type full path of the directory before the filename.
+
| To save the file in a different directory, type full '''path''' of the directory before the filename.
−
Type '''savefig('slash home slash fossee slash sine.png')'''
+
Type: '''savefig('slash home slash fossee slash sine.png')'''
  
 
|-
 
|-
 
| 02:53
 
| 02:53
−
| Note that above''' file path '''is for''' Linux based file systems.'''
+
| Note that the above''' file path '''is for''' Linux''' based file systems.
  
 
|-
 
|-
 
| 02:59
 
| 02:59
−
| For''' Windows, '''give the entire file path as shown here. Here '''fossee''' is the '''username '''in''' Windows''' and '''sine.png '''file is to be saved on '''Desktop'''.
+
| For''' Windows, '''give the entire '''file path''' as shown here. Here '''fossee''' is the '''username '''in''' Windows''' and '''sine.png '''file is to be saved on '''Desktop'''.
  
 
|-
 
|-
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| We have saved the file to  
 
| We have saved the file to  
  
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'''(slash)home(slash)fossee,'''
+
'''(slash)home(slash)fossee'''.
  
 
|-
 
|-
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|-
 
|-
 
| 03:46
 
| 03:46
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| '''savefig''' can save the plot in many formats, such as
+
| '''savefig''' can save the plot in many formats such as-
  
 
'''pdf - portable document format, '''
 
'''pdf - portable document format, '''
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|-
 
|-
 
| 03:57
 
| 03:57
−
| '''eps - encapsulated post script, '''to be used with '''LaTeX '''documents
+
| '''eps - encapsulated post script, '''to be used with '''LaTeX '''documents,
  
 
'''svg - scalable vector graphics, '''
 
'''svg - scalable vector graphics, '''
  
−
'''png - portable network graphics '''
+
'''.png - portable network graphics '''.
  
 
|-
 
|-
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|-
 
|-
 
| 04:23
 
| 04:23
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| Type '''savefig('slash home slash fossee slash sine.eps')''' and press '''Enter.'''
+
| Type: '''savefig('slash home slash fossee slash sine.eps')''' and press '''Enter.'''
  
 
|-
 
|-
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|-
 
|-
 
| 05:00
 
| 05:00
−
| This brings us to the end of this tutorial. In this tutorial,we have learnt to,
+
| This brings us to the end of this tutorial. In this tutorial, we have learnt to:
  
 
1. Save plots using the '''savefig() '''function.
 
1. Save plots using the '''savefig() '''function.
  
 
2. Save the plots in different formats like
 
2. Save the plots in different formats like
−
''' pdf - ps - png - svg - eps'''
+
''' pdf, ps, png, svg''' and '''eps'''.
  
 
|-
 
|-
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1. Which command is used to save a '''plot'''?
 
1. Which command is used to save a '''plot'''?
−
'''saveplot()'''
+
'''saveplot()''',
  
−
'''savefig()'''
+
'''savefig()''',
  
−
'''savefigure()'''
+
'''savefigure()''',
  
 
'''saveplt()'''
 
'''saveplt()'''
  
−
2. '''savefig('sine.png')'''saves the '''plot''' in
+
2. '''savefig('sine.png')'''saves the '''plot''' in-
−
 
+
the '''root directory 'slash' (on GNU/Linux, Unix based systems), '<u>C</u>:' (on windows)''',
−
'''The root directory 'slash' (on GNU/Linux, Unix based systems), '<u>C</u>:' (on windows)'''
+
  
 
|-
 
|-
 
| 05:40
 
| 05:40
−
|Will result in an '''error''' as '''full path''' is not supplied.
+
|will result in an '''error''' as '''full path''' is not supplied,
  
−
The current '''working directory'''.
+
the current '''working directory''',
  
−
Predefined directory like “'''slash '''documents.”
+
predefined directory like “'''slash documents.”'''
  
 
|-
 
|-
 
| 05:50
 
| 05:50
−
| And the answers,
+
| And the answers are-
  
 
1. To save a plot, we use the '''savefig() function.'''
 
1. To save a plot, we use the '''savefig() function.'''
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|-
 
|-
 
| 06:07
 
| 06:07
−
|Please post your general queries on Python in this forum.
+
|Please post your general queries on '''Python''' in this forum.
  
 
|-
 
|-
 
| 06:12
 
| 06:12
−
|FOSSEE team coordinates the TBC project.
+
|'''FOSSEE''' team coordinates the '''TBC project'''.
  
 
|-
 
|-
 
| 06:16
 
| 06:16
−
| Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this website.
+
| '''Spoken Tutorial''' project is funded by '''NMEICT, MHRD,''' Govt. of India. For more details, visit this website.
  
 
|-
 
|-
 
| 06:25
 
| 06:25
−
| This is Prabhu from IIT Bombay (or FOSSEE, if you wish) signing off. Thank you.
+
| This is Prabhu from '''IIT Bombay''', signing off. Thank you.
  
 
|}
 
|}

Revision as of 16:37, 12 June 2019

Time Narration
00:01 Hello friends! Welcome to the tutorial on "Saving Plots".
00:06 At the end of this tutorial, you will be able to -

save plots using savefig() function,

save plots in different formats.

00:15 To record this tutorial, I am using:

Ubuntu Linux 14.04 operating system,

Python 3.4.3,

IPython 5.1.0

00:28 To practise this tutorial, you should know how to use Plot command interactively.

If not, see the prerequisite Python tutorials on this website.

00:40 Let us first open the Terminal by pressing Ctrl+Alt+T keys simultaneously.

Now, type ipython3 and press Enter.

00:54 Let us initialise the 'pylab' package.

Type percentage pylab and press Enter.

01:05 Let us plot a sine curve from minus 3 pi to 3 pi.
01:10 First, we will calculate the required points for the plot.
01:14 To do this, type:

x equals to linspace(minus 3 star pi comma 3 star pi comma 100) in the console.

01:28 Let us plot a sine curve for the points stored in variable x.
01:33 Type: plot(x comma sin(x)) in the console and press Enter.

Don't close the plot window for rest of the tutorial.

01:47 Here you can see we have made a very basic sine plot. Now let us see how to save the plot.
01:54 For saving the plot, we will use the 'savefig()' function.

Syntax: savefig(fname)

savefig function takes one argument which is the filename.

02:05 Type: savefig('sine.png') and press Enter.
02:12 This saves the file in present working directory.
02:16 The characters after the dot in the filename is the extension. It determines the format in which you want to save the file.
02:27 To check the current working directory, type pwd in the console and press Enter.
02:34 To save the file in a different directory, type full path of the directory before the filename.

Type: savefig('slash home slash fossee slash sine.png')

02:53 Note that the above file path is for Linux based file systems.
02:59 For Windows, give the entire file path as shown here. Here fossee is the username in Windows and sine.png file is to be saved on Desktop.
03:15 Here we have used an extension dot png. This will ensure that the image is saved as a PNG file.
03:24 Now let us locate the file sine.png which we had saved earlier.
03:30 We have saved the file to

(slash)home(slash)fossee.

03:35 Let us navigate to (slash)home(slash)fossee using the file browser.
03:40 Open the sine.png file to see the plotted sine curve.
03:46 savefig can save the plot in many formats such as-

pdf - portable document format,

ps - post script,

03:57 eps - encapsulated post script, to be used with LaTeX documents,

svg - scalable vector graphics,

.png - portable network graphics .

04:10 Pause the video here, try out the following exercise and resume the video.
04:16 Save the sine plot in the eps format. Let us see the output for this exercise.
04:23 Type: savefig('slash home slash fossee slash sine.eps') and press Enter.
04:35 Now let us go to slash home slash fossee and see the new file created. We see the file sine.eps here.
04:48 Pause the video here, try out the following exercise and resume the video.

Save the sine plot in PDF, PS and SVG formats.

05:00 This brings us to the end of this tutorial. In this tutorial, we have learnt to:

1. Save plots using the savefig() function.

2. Save the plots in different formats like pdf, ps, png, svg and eps.

05:17 Here are some assignment questions for you to solve.

1. Which command is used to save a plot? saveplot(),

savefig(),

savefigure(),

saveplt()

2. savefig('sine.png')saves the plot in- the root directory 'slash' (on GNU/Linux, Unix based systems), 'C:' (on windows),

05:40 will result in an error as full path is not supplied,

the current working directory,

predefined directory like “slash documents.”

05:50 And the answers are-

1. To save a plot, we use the savefig() function.

2. If we save a file without complete path, it gets saved in the current working directory.

06:02 Please post your timed questions in this forum.
06:07 Please post your general queries on Python in this forum.
06:12 FOSSEE team coordinates the TBC project.
06:16 Spoken Tutorial project is funded by NMEICT, MHRD, Govt. of India. For more details, visit this website.
06:25 This is Prabhu from IIT Bombay, signing off. Thank you.

Contributors and Content Editors

Pratik kamble, Sandhya.np14

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