Sandhya.np14 at 11:08, 12 June 2019

2019-06-12T11:08:24Z

Sandhya.np14 at 11:07, 12 June 2019

2019-06-12T11:07:05Z

Pratik kamble: 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..."

2019-05-29T13:08:55Z

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..."

New page

{| 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 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 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 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 - 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), '<u>C</u>:' (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,

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 (or FOSSEE, if you wish) signing off. Thank you.

|}

@@ Line 188: / Line 188: @@
 '''saveplt()'''
-. '''savefig('sine.png')'''saves the '''plot''' in-
+. '''savefig('sine.png')''' saves the '''plot''' in-
 the '''root directory 'slash' (on GNU/Linux, Unix based systems), '<u>C</u>:' (on windows)''',

Python-3.4.3/C2/Saving-plots/English-timed - Revision history

Sandhya.np14 at 11:08, 12 June 2019

Sandhya.np14 at 11:07, 12 June 2019

Pratik kamble: 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..."