Axes Cookbook

Drawing plots in logarithmic scale Drawing the axis line Inverting y-axis Plotting two lines with different y axis Removing axis Setting only the lower or upper limit Setting x-axis limit Setting y-axis limit

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Setting only the lower or upper limit in Matplotlib

Programming

Python

Matplotlib

Cookbooks

Axes Cookbook

Jul 1, 2022

Last updated

local_offer Python●Matplotlib

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Example

To set only the lower or upper limit for plt.xlim(~), set either the left or right parameter:


        
        
            
                
                
                    plt.xlim(left=-2)
plt.xlim(right=2)

For plt.ylim(~), set either the bottom or top parameter:


        
        
            
                
                
                    plt.ylim(bottom=-2)
plt.ylim(top=2)

WARNING

For the effect to apply, you must call xlim(~) or ylim(~) after plotting the curve (e.g. after plt.plot(~)).

Example

Suppose we have the following parabola:


        
        
            
                
                
                    x = np.linspace(-3, 3, 1000)
plt.plot(x, x**2)

The default output is as follows:

Our goal is to set the lower y-limit of graph to 0, and leave the upper y-limit intact. We can use the following snippet:


        
        
            
                
                
                    x = np.linspace(-3, 3, 1000)
plt.plot(x, x**2)
plt.ylim(bottom=0)      # Make sure you call this after the plot(~) method

This gives us the following:

We see that our curve starts from y=0 now.

Published by Isshin Inada

Edited by 0 others

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