Difference between revisions of "Python/C2/Saving-plots/English-timed"
From Script | Spoken-Tutorial
(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…') |
|||
Line 10: | Line 10: | ||
| 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 | + | # Save plots using savefig()function. |
# Save plots in different formats. | # Save plots in different formats. | ||
Line 19: | Line 19: | ||
|- | |- | ||
|0:19 | |0:19 | ||
− | |Now, | + | |Now, Start your IPython interpreter with the command ipython hyphen pylab <Pause> |
|- | |- | ||
Line 59: | Line 59: | ||
|- | |- | ||
| 1:32 | | 1:32 | ||
− | | For saving the plot, we will use | + | | For saving the plot, we will use savefig() function. |
|- | |- | ||
Line 71: | Line 71: | ||
|- | |- | ||
| 1:52 | | 1:52 | ||
− | | Notice that | + | | 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. |
|- | |- | ||
Line 79: | Line 79: | ||
|- | |- | ||
| 2:18 | | 2:18 | ||
− | | Here we have used an extension | + | | Here we have used an extension dot png which means we want to save the image as a PNG file. |
|- | |- | ||
|2:25 | |2:25 | ||
− | |Now let us locate the file | + | |Now let us locate the file sine dot png which we had saved a while ago. |
|- | |- | ||
| 2:32 | | 2:32 | ||
− | | We have saved the file to | + | | We have saved the file to slash home slash fossee so let us navigate to slash home slash fossee using thefile browser. |
|- | |- | ||
| 2:49 | | 2:49 | ||
− | | Yes, the file | + | | Yes, the file sine dot png is here. |
|- | |- | ||
Line 99: | Line 99: | ||
|- | |- | ||
| 2:57 | | 2:57 | ||
− | | So in-order to save a plot, we use | + | | So in-order to save a plot, we use savefig function. |
|- | |- | ||
| 3:05 | | 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. |
|- | |- | ||
Line 115: | Line 115: | ||
|- | |- | ||
| 3:37 | | 3:37 | ||
− | | We still have the sine plot with us,let us now save the plot as | + | | We still have the sine plot with us,let us now save the plot as sine dot eps. |
|- | |- | ||
| 3:49 | | 3:49 | ||
− | | Now, We will save the plot using the function | + | | 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 | | 4:04 | ||
− | | Now let us go to | + | | Now let us go to slash home slash fossee and see the new file created. |
|- | |- | ||
| 4:13 | | 4:13 | ||
− | | Yes! the new file | + | | Yes! the new file sine dot epsis here. |
|- | |- | ||
Line 143: | Line 143: | ||
|- | |- | ||
|4:34 | |4:34 | ||
− | |In this tutorial,we have learnt to, Save plots using the | + | |In this tutorial,we have learnt to, Save plots using the savefig() function. |
|- | |- | ||
Line 159: | Line 159: | ||
|- | |- | ||
|4:59 | |4:59 | ||
− | | 2. | + | | 2. savefig('sine.png') saves the plot in, |
|- | |- | ||
| 5:04 | | 5:04 | ||
− | | The root directory | + | | The root directory (on GNU/Linux, Unix based systems), c colon slash (on windows). |
|- | |- | ||
Line 175: | Line 175: | ||
|- | |- | ||
| 5:21 | | 5:21 | ||
− | | and final option is Predefined directory like | + | | and final option is Predefined directory like /documents. |
|- | |- | ||
Line 183: | Line 183: | ||
|- | |- | ||
| 5:28 | | 5:28 | ||
− | |1.To save a plot,we use the | + | |1.To save a plot,we use the savefig() function. |
|- | |- |
Revision as of 15:38, 7 March 2013
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,
|
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 epsis 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