By Alexandre Devert
This e-book follows a cookbook sort procedure that places orthogonal
and non-redundant recipes on your palms. instead of rehashing
the consumer guide, the reasons disclose the underlying logic
If you're an engineer or scientist who desires to create great
visualizations with Python, instead of another specialized
language, this can be the booklet for you. whereas there are a number of very
competent plotting applications, Matplotlib is simply a Python module
Thus, if you happen to comprehend a few Python already, you'll think at domestic from
the first steps on. if you're an program author, you
won't be passed over because the integration of Matplolib is covered
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Additional info for Matplotlib Plotting Cookbook
A few colors have a one-letter alias, which is shown in the following table: 40 Alias Colors b Blue g Green r Red c Cyan m Magenta Chapter 2 Alias Colors y Yellow k Black w White ff HTML color strings: matplotlib can interpret HTML color strings as actual colors. Such strings are defined as #RRGGBB where RR, GG, and BB are the 8-bit values for the red, green, and blue components in hexadecimal. 75 for a medium light gray. How to do it... pyplot as plt def pdf(X, mu, sigma): a = 1. sqrt(2. pi)) b = -1.
Array((1, 1)) # Center the distrib. plot(). In the following script, things will be different. edu/ml/datasets/Iris. 5,Iris-versicolor Each point of the dataset is stored in a comma-separated list of values. The last column that gives the label of each point is a string that can take three possible values—Iris-virginica, Iris-versicolor, and Iris-Vertosa. loadtxt function. show() 44 Chapter 2 The preceding script will produce the following graph: How it works... For each of the three possible labels, we assign one unique color.
In this recipe, we are going to see how to use the two ways to control the colors of a scatter plot. scatter() offers the following two options to control the colors of dots through its color parameter, or its shortcut c: ff 42 Common color for all the dots: If the color parameter is a valid matplotlib color definition, then all the dots will appear in that color. Chapter 2 ff Individual color for each dot: If the color parameter is a sequence of a valid matplotlib color definition, the ith dot will appear in the ith color.