Jyotisolanki at 06:51, 29 October 2013

2013-10-29T06:51:44Z

Jyotisolanki: Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello and welcome to the tutorial on "Saving plots". |- | 0:04 | At the end of this tutorial, you will be able to, # Save plots using…'

2013-10-29T05:21:00Z

Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello and welcome to the tutorial on "Saving plots". |- | 0:04 | At the end of this tutorial, you will be able to, # Save plots using…'

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| 0:00
| Hello and welcome to the tutorial on "Saving plots".

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| 0:04
| At the end of this tutorial, you will be able to,

# Save plots using savefig()function.
# Save plots in different formats.

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| 0:13
| Before beginning this tutorial,we would suggest you to complete the tutorial on "Using plot interactively".

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|0:19
|Now, Start your IPython interpreter with the command ipython hyphen pylab

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|0:30
|As you know, it will start your IPython interpreter with the required python modules for plotting and saving your plots.

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| 0:36
| To start with, let us plot a sine wave from minus 3 pi to 3 pi.

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| 0:43
| Let us start by calculating the required points for the plot.

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| 0:45
| It can be done using linspace as,

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|0:51
|You can Type x = linspace within brackets minus 3 into pi comma 3 into pi comma 100

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| 0:59
| We have stored the required points in x.

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|1:03
|Now let us plot the points using the plot statement.So type plot (x,sinx)

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| 1:18
| Done!

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| 1:19
| we have made a very basic sine plot, now let us see how to save the plot for future use so that you can embed the plot in your reports.

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| 1:32
| So saving the plot, we will use savefig() function.

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|1:36
|For this we shall keep the plot window open alongside the terminal.

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|1:40
| The statement is savefig within brackets in single quotes slash home slash fossee slash sine dot png

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| 1:52
| Notice that savefig function takes one argument which is the filename, the last 3 characters after the. in the filename is the extension and type of the file which determines the format in which you want to save.

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| 2:10
| Also, note that we gave the full path or the absolute path to which we want to save the file.

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| 2:18
| Here we have used an extension dot png which means we want to save the image as a PNG file.

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|2:25
|Now let us locate the file sine dot png which we had saved a while ago.

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| 2:32
| We have saved the file to slash home slash fossee so let us navigate to slash home slash fossee using thefile browser.

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| 2:49
| Yes, the file sine dot png is here.

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| 2:52
|Let us open it and check.The file find out the png is here. Let us open it and check

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| 2:57
| So in-order to save a plot , we use savefig function.

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| 3:05
| dot savefig can save the plot in many formats, such as pdf - portable document format, ps - post script, eps - encapsulated post script, svg - scalable vector graphics, png - portable network graphics which support transparency etc.

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| 3:24
| Pause the video here, try out the following exercise and resume the video.

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|3:29
|Save the sine plot in the EPS format which can be embedded in LaTeX documents.

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| 3:37
| We still have the sine plot with us,let us now save the plot as sine dot eps.

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| 3:49
| Now, We will save the plot using the function savefig, so you can type savefig within brackets in single quotes slash home slash fossee slash sine dot eps and hit enter

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| 4:04
| Now let us go to slash home slash fossee and see the new file created.

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| 4:13
| Yes! the new file sine dot epsis here.

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| 4:18
| Pause the video here, try out the following exercise and resume the video.

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|4:23
|Save the sine plot in PDF, PS and SVG formats.

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| 4:31
| This brings us to the end of this tutorial.

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|4:34
|In this tutorial,we have learnt to, Save plots using the savefig() function.

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| 4:38
| then Save the plots in different formats like - pdf - ps - png - svg - eps

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| 4:45
| Here are some self assessment questions for you to solve

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|4:48
|1. Which command is used to save a plot. saveplot() savefig() savefigure() saveplt()

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|4:59
| 2. savefig('sine.png') saves the plot in,

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| 5:04
| The root directory (on GNU/Linux, Unix based systems), c colon slash (on windows).

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| 5:14
| The second option. Will result in an error as full path is not supplied.

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| 5:18
| The third one.The current working directory.

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| 5:21
| and final option is Predefined directory like /documents.

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| 5:26
| And now, the answers,

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| 5:28
|1.To save a plot,we use the savefig() function.

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|5:33
|2. Whenever we save a file,it gets saved in the current working directory.

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| 5:38
| Hope you have enjoyed and found it useful.THanks

Python/C2/Saving-plots/Gujarati - Revision history

Jyotisolanki at 06:51, 29 October 2013

Jyotisolanki: Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello and welcome to the tutorial on "Saving plots". |- | 0:04 | At the end of this tutorial, you will be able to, # Save plots using…'