Python-3.4.3/C2/Other-Types-Of-Plots/English
'lPython/C2/Other-types-of-plots/English'Title of script: Other types of plots.
Author: Anoop Jacob Thomas, Thirumalesh H S
Keywords: Python, IPython, pylab, scatter plot, loglog plot, video tutorial
Visual Cue | Narration |
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Hello friends. Welcome to the tutorial on Other types of plots |
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Learning Objectives
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At the end of this tutorial, you will be able to -
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System Specifications |
To record this tutorial, I am using
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Pre-requisites
If not, see the relevant Python tutorials on http://spoken-tutorial.org
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To practice this tutorial, you should know how to
If not, see the relevant Python tutorials on this website. |
[Terminal]
ipython3
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Let us first open the Terminal by pressing Ctrl+Alt+T keys simultaneously.
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[IPython console]
%pylab and press Enter. |
Let us initialise the pylab package.
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Scatter plot |
In a scatter plot, the data is displayed as a collection of points.
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Exercise 1 |
* Plot a scatter plot showing the percentage profit of a company A from the year 2000-2010.
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In terminal type:
cat company-a-data.txt |
Let us see the content of the file company-a-data.txt
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Show cat company-a-data.txt output | The data file has two columns with a set of values in each column.
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[IPython Terminal]
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To produce the scatter plot,
Type
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Highlight unpack = True | unpack equal to True returns the transposed array of data |
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scatter() function
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scatter() function is used to generate the scatter graph
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[IPython Terminal]
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Let us use scatter() function to plot scatter graph for data stored in year and profit.
First one being the values in x-coordinate – year.
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Exercise |
Pause the video here, try out the following exercise and resume the video.
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[IPython Terminal]
scatter(year,profit,color='r',marker='d')
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Solution to Exercise
scatter within parentheses year comma profit comma color equal to within single quotes r comma marker equal to within single quotes d and press Enter |
Show plot window | Thus, we got our scatter plot.
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log-log graph
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* A log-log plot is a two-dimensional graph of numerical data.
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loglog() function
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Syntax
loglog within parentheses x comma y
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Exercise 3 |
Plot a log-log chart of y equal to 5 times x(cube) for x from 1 to 20. |
[IPython Terminal]
y = 5*x**3
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Before we actually plot, let us calculate the points needed for that.
x = linspace within parentheses 1 comma 20 comma 100 and press Enter y equal to 5 into x raised to 3 and press Enter |
[IPython Terminal]
clf() loglog(x,y)
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Clear the plot window by typing clf parentheses and press Enter
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Show plot window | We see the required plot |
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Summary
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This brings us to the end of this tutorial. In this tutorial we learnt to,
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Assignment
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Here are some self assessment questions for you to solve.
and plot within parentheses x comma y comma color equal to within single quotes b comma marker equal to within single quotes ddoes exactly the same.?
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Solution to assignment
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And the answers,
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Forum |
Please post your timed queries in this forum. |
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Fossee Forum |
Please post your general queries on Python in this forum. |
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Textbook Companion |
FOSSEE team coordinates the TBC project. |
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Acknowledgment |
Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India.
For more details, visit this website. |
Previous slide | This is _________ from IIT Bombay (or FOSSEE, if you wish) signing off.
Thank you. |