.. _misc-rasterization_demo:

misc example code: rasterization_demo.py
========================================

[`source code <rasterization_demo.py>`_]

::

    import numpy as np
    import matplotlib.pyplot as plt
    
    d = np.arange(100).reshape(10, 10)
    x, y = np.meshgrid(np.arange(11), np.arange(11))
    
    theta = 0.25*np.pi
    xx = x*np.cos(theta) - y*np.sin(theta)
    yy = x*np.sin(theta) + y*np.cos(theta)
    
    ax1 = plt.subplot(221)
    ax1.set_aspect(1)
    ax1.pcolormesh(xx, yy, d)
    ax1.set_title("No Rasterization")
    
    ax2 = plt.subplot(222)
    ax2.set_aspect(1)
    ax2.set_title("Rasterization")
    
    m = ax2.pcolormesh(xx, yy, d)
    m.set_rasterized(True)
    
    ax3 = plt.subplot(223)
    ax3.set_aspect(1)
    ax3.pcolormesh(xx, yy, d)
    ax3.text(0.5, 0.5, "Text", alpha=0.2,
             va="center", ha="center", size=50, transform=ax3.transAxes)
    
    ax3.set_title("No Rasterization")
    
    
    ax4 = plt.subplot(224)
    ax4.set_aspect(1)
    m = ax4.pcolormesh(xx, yy, d)
    m.set_zorder(-20)
    
    ax4.text(0.5, 0.5, "Text", alpha=0.2,
             zorder=-15,
             va="center", ha="center", size=50, transform=ax4.transAxes)
    
    ax4.set_rasterization_zorder(-10)
    
    ax4.set_title("Rasterization z$<-10$")
    
    
    # ax2.title.set_rasterized(True) # should display a warning
    
    plt.savefig("test_rasterization.pdf", dpi=150)
    plt.savefig("test_rasterization.eps", dpi=150)
    
    if not plt.rcParams["text.usetex"]:
        plt.savefig("test_rasterization.svg", dpi=150)
        # svg backend currently ignores the dpi
    

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