SF.net SVN: matplotlib:[7616] branches/v0_99_maint/examples/pylab_examples/ barb_demo.py

[<ry...@us...>]

Revision: 7616
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=7616&view=rev
Author:   ryanmay
Date:     2009-08-31 17:27:12 +0000 (Mon, 31 Aug 2009)

Log Message:
-----------
Update barb_demo.py with an example using masked arrays.

Modified Paths:
--------------
    branches/v0_99_maint/examples/pylab_examples/barb_demo.py

Modified: branches/v0_99_maint/examples/pylab_examples/barb_demo.py
===================================================================
--- branches/v0_99_maint/examples/pylab_examples/barb_demo.py	2009-08-31 16:48:46 UTC (rev 7615)
+++ branches/v0_99_maint/examples/pylab_examples/barb_demo.py	2009-08-31 17:27:12 UTC (rev 7616)
@@ -28,7 +28,7 @@
 ax.barbs(data['x'], data['y'], data['u'], data['v'], length=8, pivot='middle')
 
 #Showing colormapping with uniform grid.  Fill the circle for an empty barb,
-#don't round the values, and change some of the size parameters 
+#don't round the values, and change some of the size parameters
 ax = plt.subplot(2,2,3)
 ax.barbs(X, Y, U, V, np.sqrt(U*U + V*V), fill_empty=True, rounding=False,
     sizes=dict(emptybarb=0.25, spacing=0.2, height=0.3))
@@ -39,4 +39,15 @@
     barbcolor=['b','g'], barb_increments=dict(half=10, full=20, flag=100),
     flip_barb=True)
 
+#Masked arrays are also supported
+masked_u = np.ma.masked_array(data['u'])
+masked_u[4] = 1000 #Bad value that should not be plotted when masked
+masked_u[4] = np.ma.masked
+
+#Identical plot to panel 2 in the first figure, but with the point at
+#(0.5, 0.25) missing (masked)
+fig2 = plt.figure()
+ax = fig2.add_subplot(1, 1, 1)
+ax.barbs(data['x'], data['y'], masked_u, data['v'], length=8, pivot='middle')
+
 plt.show()


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