Revision: 7431
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=7431&view=rev
Author: jdh2358
Date: 2009-08-08 15:10:08 +0000 (Sat, 08 Aug 2009)
Log Message:
-----------
use a class helper method to make the compound path from polys
Modified Paths:
--------------
branches/v0_99_maint/examples/animation/histogram_tkagg.py
branches/v0_99_maint/examples/api/histogram_path_demo.py
branches/v0_99_maint/lib/matplotlib/path.py
Modified: branches/v0_99_maint/examples/animation/histogram_tkagg.py
===================================================================
--- branches/v0_99_maint/examples/animation/histogram_tkagg.py 2009-08-08
13:58:52 UTC (rev 7430)
+++ branches/v0_99_maint/examples/animation/histogram_tkagg.py 2009-08-08
15:10:08 UTC (rev 7431)
@@ -2,6 +2,7 @@
This example shows how to use a path patch to draw a bunch of
rectangles for an animated histogram
"""
+import time
import numpy as np
import matplotlib
matplotlib.use('TkAgg') # do this before importing pylab
@@ -52,6 +53,10 @@
ax.set_ylim(bottom.min(), top.max())
def animate():
+ if animate.cnt>=100:
+ return
+
+ animate.cnt += 1
# simulate new data coming in
data = np.random.randn(1000)
n, bins = np.histogram(data, 100)
@@ -59,11 +64,7 @@
verts[1::5,1] = top
verts[2::5,1] = top
fig.canvas.draw()
-
-def run():
- for i in range(100):
- fig.canvas.manager.window.after(100, animate)
-
-
-fig.canvas.manager.window.after(100, run)
+ fig.canvas.manager.window.after(100, animate)
+animate.cnt = 0
+fig.canvas.manager.window.after(100, animate)
plt.show()
Modified: branches/v0_99_maint/examples/api/histogram_path_demo.py
===================================================================
--- branches/v0_99_maint/examples/api/histogram_path_demo.py 2009-08-08
13:58:52 UTC (rev 7430)
+++ branches/v0_99_maint/examples/api/histogram_path_demo.py 2009-08-08
15:10:08 UTC (rev 7431)
@@ -20,8 +20,9 @@
# histogram our data with numpy
data = np.random.randn(1000)
-n, bins = np.histogram(data, 100)
+n, bins = np.histogram(data, 50)
+
# get the corners of the rectangles for the histogram
left = np.array(bins[:-1])
right = np.array(bins[1:])
@@ -29,28 +30,24 @@
top = bottom + n
nrects = len(left)
-# here comes the tricky part -- we have to set up the vertex and path
-# codes arrays using moveto, lineto and closepoly
+XY = np.zeros((nrects, 4, 2))
+XY[:,0,0] = left
+XY[:,0,1] = bottom
-# for each rect: 1 for the MOVETO, 3 for the LINETO, 1 for the
-# CLOSEPOLY; the vert for the closepoly is ignored but we still need
-# it to keep the codes aligned with the vertices
-nverts = nrects*(1+3+1)
-verts = np.zeros((nverts, 2))
-codes = np.ones(nverts, int) * path.Path.LINETO
-codes[0::5] = path.Path.MOVETO
-codes[4::5] = path.Path.CLOSEPOLY
-verts[0::5,0] = left
-verts[0::5,1] = bottom
-verts[1::5,0] = left
-verts[1::5,1] = top
-verts[2::5,0] = right
-verts[2::5,1] = top
-verts[3::5,0] = right
-verts[3::5,1] = bottom
+XY[:,1,0] = left
+XY[:,1,1] = top
-barpath = path.Path(verts, codes)
-patch = patches.PathPatch(barpath, facecolor='green', edgecolor='yellow',
alpha=0.5)
+XY[:,2,0] = right
+XY[:,2,1] = top
+
+XY[:,3,0] = right
+XY[:,3,1] = bottom
+
+
+
+barpath = path.Path.make_compound_path_from_polys(XY)
+print barpath.codes[:7], barpath.codes[-7:]
+patch = patches.PathPatch(barpath, facecolor='blue', edgecolor='gray',
alpha=0.8)
ax.add_patch(patch)
ax.set_xlim(left[0], right[-1])
Modified: branches/v0_99_maint/lib/matplotlib/path.py
===================================================================
--- branches/v0_99_maint/lib/matplotlib/path.py 2009-08-08 13:58:52 UTC (rev
7430)
+++ branches/v0_99_maint/lib/matplotlib/path.py 2009-08-08 15:10:08 UTC (rev
7431)
@@ -129,6 +129,34 @@
self._interpolation_steps = _interpolation_steps
@classmethod
+ def make_compound_path_from_polys(cls, XY):
+ """
+ (static method) Make a compound path object to draw a number
+ of polygons with equal numbers of sides XY is a (numpolys x
+ numsides x 2) numpy array of vertices. Return object is a
+ :class:`Path`
+
+ .. plot:: mpl_examples/api/histogram_path_demo.py
+
+ """
+
+ # for each poly: 1 for the MOVETO, (numsides-1) for the LINETO, 1 for
the
+ # CLOSEPOLY; the vert for the closepoly is ignored but we still need
+ # it to keep the codes aligned with the vertices
+ numpolys, numsides, two = XY.shape
+ assert(two==2)
+ stride = numsides + 1
+ nverts = numpolys * stride
+ verts = np.zeros((nverts, 2))
+ codes = np.ones(nverts, int) * cls.LINETO
+ codes[0::stride] = cls.MOVETO
+ codes[numsides::stride] = cls.CLOSEPOLY
+ for i in range(numsides):
+ verts[i::stride] = XY[:,i]
+
+ return cls(verts, codes)
+
+ @classmethod
def make_compound_path(cls, *args):
"""
(staticmethod) Make a compound path from a list of Path
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