Python/C2/Saving-plots/English-timed

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 savefig() function. Save plots in different formats.
0:13	Before beginning this tutorial,we would suggest you to complete the tutorial on "Using plot interactively".
0:19	Now, Start your IPython interpreter with the command ipython hyphen pylab <Pause>
0:30	As you know, it will start your IPython interpreter with the required python modules for plotting and saving your plots.
0:36	To start with, let us plot a sine wave from minus 3 pi to 3 pi.
0:43	Let us start by calculating the required points for the plot.
0:45	It can be done using linspace as,
0:51	Type x = linspace within brackets minus 3 into pi comma 3 into pi comma 100
0:59	We have stored the required points in x.
1:03	Now let us plot the points using the plot statement.
1:18	Done!
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.
1:32	For saving the plot, we will use savefig() function.
1:36	For this we shall keep the plot window open alongside the terminal.
1:40	The statement is,savefig within brackets in single quotes slash home slash fossee slash sine dot png
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.
2:10	Also, note that we gave the full path or the absolute path to which we want to save the file.
2:18	Here we have used an extension dot png which means we want to save the image as a PNG file.
2:25	Now let us locate the file sine dot png which we had saved a while ago.
2:32	We have saved the file to slash home slash fossee so let us navigate to slash home slash fossee using thefile browser.
2:49	Yes, the file sine dot png is here.
2:52	Let us open it and check.
2:57	So in-order to save a plot, we use savefig function.
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.
3:24	Pause the video here, try out the following exercise and resume the video.
3:29	Save the sine plot in the EPS format which can be embedded in LaTeX documents.
3:37	We still have the sine plot with us,let us now save the plot as sine dot eps.
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
4:04	Now let us go to slash home slash fossee and see the new file created.
4:13	Yes! the new file sine dot eps is here.
4:18	Pause the video here, try out the following exercise and resume the video.
4:23	Save the sine plot in PDF, PS and SVG formats.
4:31	This brings us to the end of this tutorial.
4:34	In this tutorial,we have learnt to, Save plots using the savefig() function.
4:38	then Save the plots in different formats like - pdf - ps - png - svg - eps
4:45	Here are some self assessment questions for you to solve
4:48	1. Which command is used to save a plot. saveplot() savefig() savefigure() saveplt()
4:59	2. savefig('sine.png') saves the plot in,
5:04	The root directory / (on GNU/Linux, Unix based systems), c colon slash (on windows).
5:14	The second option. Will result in an error as full path is not supplied.
5:18	The third one.The current working directory.
5:21	and final option is Predefined directory like /documents.
5:26	And now, the answers,
5:28	1.To save a plot,we use the savefig() function.
5:33	2. Whenever we save a file,it gets saved in the current working directory.
5:38	Hope you have enjoyed and found it useful.

Contributors and Content Editors

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