Python/C2/Saving-plots/English-timed

Time	Narration
00:00	Hello and welcome to the tutorial on "Saving plots".
00:04	At the end of this tutorial, you will be able to, Save plots using savefig()function. Save plots in different formats.
00:13	Before beginning this tutorial,we would suggest you to complete the tutorial on "Using plot interactively".
00:19	Now, Start your IPython interpreter with the command ipython hyphen pylab
00:30	As you know, it will start your IPython interpreter with the required python modules for plotting and saving your plots.
00:36	To start with, let us plot a sine wave from minus 3 pi to 3 pi.
00:43	Let us start by calculating the required points for the plot.
00:45	It can be done using linspace as,
00:51	You can Type x = linspace within brackets minus 3 into pi comma 3 into pi comma 100
00:59	We have stored the required points in x.
01:03	Now let us plot the points using the plot statement.So type plot (x,sinx)
01:18	Done!
01:19	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.
01:32	So saving the plot, we will use savefig() function.
01:36	For this we shall keep the plot window open alongside the terminal.
01:40	The statement is savefig within brackets in single quotes slash home slash fossee slash sine dot png
01:52	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.
02:10	Also, note that we gave the full path or the absolute path to which we want to save the file.
02:18	Here we have used an extension dot png which means we want to save the image as a PNG file.
02:25	Now let us locate the file sine dot png which we had saved a while ago.
02:32	We have saved the file to slash home slash fossee so let us navigate to slash home slash fossee using thefile browser.
02:49	Yes, the file sine dot png is here.
02:52	Let us open it and check
02:57	So in-order to save a plot , we use savefig function.
03:05	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.
03:24	Pause the video here, try out the following exercise and resume the video.
03:29	Save the sine plot in the EPS format which can be embedded in LaTeX documents.
03:37	We still have the sine plot with us,let us now save the plot as sine dot eps.
03:49	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
04:04	Now let us go to slash home slash fossee and see the new file created.
04:13	Yes! the new file sine dot epsis here.
04:18	Pause the video here, try out the following exercise and resume the video.
04:23	Save the sine plot in PDF, PS and SVG formats.
04:31	This brings us to the end of this tutorial.
04:34	In this tutorial,we have learnt to, Save plots using the savefig() function.
04:38	then Save the plots in different formats like - pdf - ps - png - svg - eps
04:45	Here are some self assessment questions for you to solve
04:48	1. Which command is used to save a plot. saveplot() savefig() savefigure() saveplt()
04:59	2. savefig('sine.png') saves the plot in,
05:04	The root directory (on GNU/Linux, Unix based systems), c colon slash (on windows).
05:14	The second option. Will result in an error as full path is not supplied.
05:18	The third one.The current working directory.
05:21	and final option is Predefined directory like /documents.
05:26	And now, the answers,
05:28	1.To save a plot,we use the savefig() function.
05:33	2. Whenever we save a file,it gets saved in the current working directory.
05:38	Hope you have enjoyed and found it useful.THanks

Contributors and Content Editors

Gaurav, Jyotisolanki, Minal, PoojaMoolya, Sandhya.np14, Sneha