Revision: 6113
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6113&view=rev
Author: efiring
Date: 2008-09-19 00:30:54 +0000 (Fri, 19 Sep 2008)
Log Message:
-----------
Added an EllipseCollection class to collections.py
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/collections.py
Added Paths:
-----------
trunk/matplotlib/examples/pylab_examples/ellipse_collection.py
Added: trunk/matplotlib/examples/pylab_examples/ellipse_collection.py
===================================================================
--- trunk/matplotlib/examples/pylab_examples/ellipse_collection.py
(rev 0)
+++ trunk/matplotlib/examples/pylab_examples/ellipse_collection.py
2008-09-19 00:30:54 UTC (rev 6113)
@@ -0,0 +1,34 @@
+import matplotlib.pyplot as plt
+import numpy as np
+from matplotlib.collections import EllipseCollection
+
+x = np.arange(10)
+y = np.arange(15)
+X, Y = np.meshgrid(x, y)
+
+XY = np.hstack((X.ravel()[:,np.newaxis], Y.ravel()[:,np.newaxis]))
+
+ww = X/10.0
+hh = Y/15.0
+aa = X*9
+
+
+ax = plt.subplot(1,1,1)
+
+ec = EllipseCollection(
+ ww,
+ hh,
+ aa,
+ units='x',
+ offsets=XY,
+ transOffset=ax.transData)
+ec.set_array((X+Y).ravel())
+ax.add_collection(ec)
+ax.autoscale_view()
+ax.set_xlabel('X')
+ax.set_ylabel('y')
+cbar = plt.colorbar(ec)
+cbar.set_label('X+Y')
+plt.show()
+
+
Modified: trunk/matplotlib/lib/matplotlib/collections.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/collections.py 2008-09-18 23:36:43 UTC
(rev 6112)
+++ trunk/matplotlib/lib/matplotlib/collections.py 2008-09-19 00:30:54 UTC
(rev 6113)
@@ -10,7 +10,7 @@
"""
import copy, math, warnings
import numpy as np
-import numpy.ma as ma
+from numpy import ma
import matplotlib as mpl
import matplotlib.cbook as cbook
import matplotlib.colors as _colors # avoid conflict with kwarg
@@ -878,7 +878,7 @@
"""
A collection of circles, drawn using splines.
"""
- def __init__(self, sizes):
+ def __init__(self, sizes, **kwargs):
"""
*sizes*
Gives the area of the circle in points^2
@@ -900,7 +900,93 @@
for x in self._sizes]
return Collection.draw(self, renderer)
+ def get_paths(self):
+ return self._paths
+class EllipseCollection(Collection):
+ """
+ A collection of ellipses, drawn using splines.
+ """
+ def __init__(self, widths, heights, angles, units='points', **kwargs):
+ """
+ *widths*: sequence
+ half-lengths of first axes (e.g., semi-major axis lengths)
+
+ *heights*: sequence
+ half-lengths of second axes
+
+ *angles*: sequence
+ angles of first axes, degrees CCW from the X-axis
+
+ *units*: ['points' | 'inches' | 'dots' | 'width' | 'height' | 'x' |
'y']
+ units in which majors and minors are given; 'width' and 'height'
+ refer to the dimensions of the axes, while 'x' and 'y'
+ refer to the *offsets* data units.
+
+ Additional kwargs inherited from the base :class:`Collection`:
+
+ %(Collection)s
+ """
+ Collection.__init__(self,**kwargs)
+ self._widths = np.asarray(widths).ravel()
+ self._heights = np.asarray(heights).ravel()
+ self._angles = np.asarray(angles).ravel() *(np.pi/180.0)
+ self._units = units
+ self.set_transform(transforms.IdentityTransform())
+ self._transforms = []
+ self._paths = [mpath.Path.unit_circle()]
+ self._initialized = False
+
+
+ __init__.__doc__ = cbook.dedent(__init__.__doc__) % artist.kwdocd
+
+ def _init(self):
+ def on_dpi_change(fig):
+ self._transforms = []
+ self.figure.callbacks.connect('dpi_changed', on_dpi_change)
+ self._initialized = True
+
+ def set_transforms(self):
+ if not self._initialized:
+ self._init()
+ self._transforms = []
+ ax = self.axes
+ fig = self.figure
+ if self._units in ('x', 'y'):
+ if self._units == 'x':
+ dx0 = ax.viewLim.width
+ dx1 = ax.bbox.width
+ else:
+ dx0 = ax.viewLim.height
+ dx1 = ax.bbox.height
+ sc = dx1/dx0
+ else:
+ if self._units == 'inches':
+ sc = fig.dpi
+ elif self._units == 'points':
+ sc = fig.dpi / 72.0
+ elif self._units == 'width':
+ sc = ax.bbox.width
+ elif self._units == 'height':
+ sc = ax.bbox.height
+ elif self._units == 'dots':
+ sc = 1.0
+ else:
+ raise ValueError('unrecognized units: %s' % self._units)
+
+ _affine = transforms.Affine2D
+ for x, y, a in zip(self._widths, self._heights, self._angles):
+ trans = _affine().scale(x * sc, y * sc).rotate(a)
+ self._transforms.append(trans)
+
+ def draw(self, renderer):
+ if True: ###not self._transforms:
+ self.set_transforms()
+ return Collection.draw(self, renderer)
+
+ def get_paths(self):
+ return self._paths
+
class PatchCollection(Collection):
"""
A generic collection of patches.
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