.. _pylab_examples-axis_equal_demo:

pylab_examples example code: axis_equal_demo.py
===============================================



.. plot:: /home/tcaswell/src/p/matplotlib/doc/mpl_examples/pylab_examples/axis_equal_demo.py

::

    '''This example is only interesting when ran in interactive mode'''
    
    import matplotlib.pyplot as plt
    import numpy as np
    
    # Plot circle or radius 3
    
    an = np.linspace(0, 2*np.pi, 100)
    
    plt.subplot(221)
    plt.plot(3*np.cos(an), 3*np.sin(an))
    plt.title('not equal, looks like ellipse', fontsize=10)
    
    plt.subplot(222)
    plt.plot(3*np.cos(an), 3*np.sin(an))
    plt.axis('equal')
    plt.title('equal, looks like circle', fontsize=10)
    
    plt.subplot(223)
    plt.plot(3*np.cos(an), 3*np.sin(an))
    plt.axis('equal')
    plt.axis([-3, 3, -3, 3])
    plt.title('looks like circle, even after changing limits', fontsize=10)
    
    plt.subplot(224)
    plt.plot(3*np.cos(an), 3*np.sin(an))
    plt.axis('equal')
    plt.axis([-3, 3, -3, 3])
    plt.plot([0, 4], [0, 4])
    plt.title('still equal after adding line', fontsize=10)
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)