.. _pylab_examples-fill_spiral:

pylab_examples example code: fill_spiral.py
===========================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/fill_spiral.py

::

    import matplotlib.pyplot as plt
    import numpy as np
    
    theta = np.arange(0, 8*np.pi, 0.1)
    a = 1
    b = .2
    
    for dt in np.arange(0, 2*np.pi, np.pi/2.0):
    
        x = a*np.cos(theta + dt)*np.exp(b*theta)
        y = a*np.sin(theta + dt)*np.exp(b*theta)
    
        dt = dt + np.pi/4.0
    
        x2 = a*np.cos(theta + dt)*np.exp(b*theta)
        y2 = a*np.sin(theta + dt)*np.exp(b*theta)
    
        xf = np.concatenate((x, x2[::-1]))
        yf = np.concatenate((y, y2[::-1]))
    
        p1 = plt.fill(xf, yf)
    
    plt.show()
    

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