.. _pylab_examples-scatter_masked:

pylab_examples example code: scatter_masked.py
==============================================



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

::

    import matplotlib.pyplot as plt
    import numpy as np
    
    N = 100
    r0 = 0.6
    x = 0.9*np.random.rand(N)
    y = 0.9*np.random.rand(N)
    area = np.pi*(10 * np.random.rand(N))**2  # 0 to 10 point radii
    c = np.sqrt(area)
    r = np.sqrt(x*x + y*y)
    area1 = np.ma.masked_where(r < r0, area)
    area2 = np.ma.masked_where(r >= r0, area)
    plt.scatter(x, y, s=area1, marker='^', c=c)
    plt.scatter(x, y, s=area2, marker='o', c=c)
    # Show the boundary between the regions:
    theta = np.arange(0, np.pi/2, 0.01)
    plt.plot(r0*np.cos(theta), r0*np.sin(theta))
    
    plt.show()
    

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