Revision: 5583
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5583&view=rev
Author: mdboom
Date: 2008-06-17 11:02:08 -0700 (Tue, 17 Jun 2008)
Log Message:
-----------
Add a generic PatchCollection class.
Modified Paths:
--------------
trunk/matplotlib/CHANGELOG
trunk/matplotlib/lib/matplotlib/collections.py
Added Paths:
-----------
trunk/matplotlib/examples/api/patch_collection.py
Modified: trunk/matplotlib/CHANGELOG
===================================================================
--- trunk/matplotlib/CHANGELOG 2008-06-17 17:23:30 UTC (rev 5582)
+++ trunk/matplotlib/CHANGELOG 2008-06-17 18:02:08 UTC (rev 5583)
@@ -1,3 +1,6 @@
+2008-06-17 Add a generic PatchCollection class that can contain any
+ kind of patch. - MGD
+
2008-06-13 Change pie chart label alignment to avoid having labels
overwrite the pie - MGD
Added: trunk/matplotlib/examples/api/patch_collection.py
===================================================================
--- trunk/matplotlib/examples/api/patch_collection.py
(rev 0)
+++ trunk/matplotlib/examples/api/patch_collection.py 2008-06-17 18:02:08 UTC
(rev 5583)
@@ -0,0 +1,38 @@
+import matplotlib
+from matplotlib.patches import Circle, Wedge, Polygon
+from matplotlib.collections import PatchCollection
+import pylab
+
+fig=pylab.figure()
+ax=fig.add_subplot(111)
+
+resolution = 50 # the number of vertices
+N = 3
+x = pylab.rand(N)
+y = pylab.rand(N)
+radii = 0.1*pylab.rand(N)
+patches = []
+for x1,y1,r in zip(x, y, radii):
+ circle = Circle((x1,y1), r)
+ patches.append(circle)
+
+x = pylab.rand(N)
+y = pylab.rand(N)
+radii = 0.1*pylab.rand(N)
+theta1 = 360.0*pylab.rand(N)
+theta2 = 360.0*pylab.rand(N)
+for x1,y1,r,t1,t2 in zip(x, y, radii, theta1, theta2):
+ wedge = Wedge((x1,y1), r, t1, t2)
+ patches.append(wedge)
+
+for i in range(N):
+ polygon = Polygon(pylab.rand(N,2), True)
+ patches.append(polygon)
+
+colors = 100*pylab.rand(len(patches))
+p = PatchCollection(patches, cmap=matplotlib.cm.jet)
+p.set_array(pylab.array(colors))
+ax.add_collection(p)
+pylab.colorbar(p)
+
+pylab.show()
Modified: trunk/matplotlib/lib/matplotlib/collections.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/collections.py 2008-06-17 17:23:30 UTC
(rev 5582)
+++ trunk/matplotlib/lib/matplotlib/collections.py 2008-06-17 18:02:08 UTC
(rev 5583)
@@ -775,7 +775,68 @@
return self._edgecolors
get_colors = get_color # for compatibility with old versions
+class PatchCollection(Collection):
+ """
+ A generic collection of patches.
+ This makes it easier to assign a color map to a heterogeneous
+ collection of patches.
+
+ This also may improve plotting speed, since PatchCollection will
+ draw faster than a large number of patches.
+ """
+
+ def __init__(self, patches, match_original=False, **kwargs):
+ """
+ *patches*
+ a sequence of Patch objects. This list may include
+ a heterogeneous assortment of different patch types.
+
+ *match_original* If True, use the colors and linewidths of the
+ original patches. If False, new colors may be assigned by
+ providing the standard collection arguments, facecolor,
+ edgecolor, linewidths, norm or cmap.
+
+ If any of *edgecolors*, *facecolors*, *linewidths*,
+ *antialiaseds* are None, they default to their
+ :data:`matplotlib.rcParams` patch setting, in sequence form.
+
+ The use of :class:`~matplotlib.cm.ScalarMappable` is optional.
+ If the :class:`~matplotlib.cm.ScalarMappable` matrix _A is not
+ None (ie a call to set_array has been made), at draw time a
+ call to scalar mappable will be made to set the face colors.
+ """
+
+ if match_original:
+ def determine_facecolor(patch):
+ if patch.fill():
+ return patch.get_facecolor()
+ return [0, 0, 0, 0]
+
+ facecolors = [determine_facecolor(p) for p in patches]
+ edgecolors = [p.get_edgecolor() for p in patches]
+ linewidths = [p.get_linewidths() for p in patches]
+ antialiaseds = [p.get_antialiased() for p in patches]
+
+ Collection.__init__(
+ self,
+ edgecolors=edgecolors,
+ facecolors=facecolors,
+ linewidths=linewidths,
+ linestyles='solid',
+ antialiaseds = antialiaseds)
+ else:
+ Collection.__init__(self, **kwargs)
+
+ paths = [p.get_transform().transform_path(p.get_path())
+ for p in patches]
+
+ self._paths = paths
+
+ def get_paths(self):
+ return self._paths
+
+
artist.kwdocd['Collection'] = patchstr = artist.kwdoc(Collection)
for k in ('QuadMesh', 'PolyCollection', 'BrokenBarHCollection',
'RegularPolyCollection',
'StarPolygonCollection'):
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