added polar demos

svn path=/trunk/matplotlib/; revision=615

Author: jdh2358

CHANGELOG

@@ -20,7 +20,7 @@ New entries should be added at the top
 2004-09-30 Added Andrew Dalke's strftime code to extend the range of
            dates supported by the DateFormatter - JDH
 
-2004-09-30 Added hbar - JDH
+2004-09-30 Added barh - JDH
 
 2004-09-30 Removed fallback to alternate array package from numerix
            so that ImportErrors are easier to debug.           JTM

Makefile

@@ -12,6 +12,7 @@ RELEASE = matplotlib-${VERSION}
 
 clean: 
 	${PYTHON} setup.py clean;\
+	rm -f *.png *.ps *.eps *.svg
 	find . -name "_tmp*.py" | xargs rm -f;\
 	find . \( -name "*~" -o -name "*.pyc" \) | xargs rm -f;\
 	find examples \( -name "*.svg" -o -name "*.png" -o -name "*.ps"  -o -name "*.jpg" -o -name "*.eps" -o -name "*.tar" -name "*.gz" \) | xargs rm -f

examples/polar_demo.py

@@ -53,11 +53,18 @@
 
 from matplotlib.matlab import *
 
-r = arange(0,4,0.001)
-theta = 6*pi*r
-polar(theta, r)
-title("It's about time!")
-savefig('polar_demo')
-ax = gca()
+# radar green, solid grid lines
+rc('grid', color='#316931', linewidth=1, linestyle='-')
+rc('tick', labelsize=15)
+# force square figure and square axes looks better for polar, IMO
+figure(figsize=(8,8))
+ax = axes([0.1, 0.1, 0.8, 0.8], polar=True, axisbg='#d5de9c')
+
+r = arange(0,1,0.001)
+theta = 2*2*pi*r
+polar(theta, r, color='#ee8d18', lw=3)
+set(ax.thetagridlabels, y=1.075) # the radius of the grid labels
 
+title("And there was much rejoicing!", fontsize=20)
+savefig('polar_demo')
 show()

examples/polar_demo2.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+# a polar scatter plot; size increases radially in this example and
+# color increases with angle (just to verify the symbols are being
+# scattered correctlu).  In a real example, this would be wasting
+# dimensionlaity of the plot
+from matplotlib.matlab import *
+
+N = 150
+r = 2*rand(N)
+theta = 2*pi*rand(N) 
+area = 200*r**2*rand(N)
+colors = theta
+ax = subplot(111, polar=True)
+c = scatter(theta, r, c=colors, s=area)
+c.set_alpha(0.75)
+
+#savefig('polar_scatter')
+show()

lib/matplotlib/axes.py

@@ -2800,7 +2800,7 @@ class PolarAxes(Axes):
       thetagridlines  : a list of Line2D for the theta grids
       rgridlines      : a list of Line2D for the radial grids
       thetagridlabels : a list of Text for the theta grid labels
-      rgridlabels : a list of Text for the theta grid labels                  
+      rgridlabels     : a list of Text for the theta grid labels                  
 
     """
 
@@ -2837,6 +2837,7 @@ def cla(self):
 
         self._gridOn = rcParams['polaraxes.grid']
         self.lines = []
+        self.collections = []        
         self.texts = []     # text in axis coords
 
         self.grid(self._gridOn)
@@ -2973,6 +2974,8 @@ def draw(self, renderer):
         for t in self.texts:
             t.draw(renderer)
 
+        for c in self.collections:
+            c.draw(renderer)
         self.title.draw(renderer)
         self.transData.thaw()  # release the lazy objects
         self.transAxes.thaw()  # release the lazy objects
@@ -3013,7 +3016,7 @@ def set_thetagridlabels(self, angles, fmt='%d', frac = 1.1, **kwargs):
             self.thetagridlabels.append(t)
         return self.thetagridlabels
 
-    def set_rgridlabels(self, radii, angle=67.5, **kwargs):
+    def set_rgridlabels(self, radii, angle=22.5, **kwargs):
         """
         Set the radial grid labels at radial distances in radii along
         the radius at angle
@@ -3041,7 +3044,7 @@ def set_rgridlabels(self, radii, angle=67.5, **kwargs):
 
     def has_data(self):
         'return true if any artists have been added to axes'
-        return len(self.lines)
+        return len(self.lines)+len(self.collections)
 
     def set_xlabel(self, xlabel, fontdict=None, **kwargs):
         'xlabel not implemented'

lib/matplotlib/matlab.py

@@ -42,6 +42,7 @@
   imshow   - plot image data
   pcolor   - make a pseudocolor plot
   plot     - make a line plot
+  polar    - make a polar plot on a PolarAxes
   psd      - make a plot of power spectral density
   rc       - control the default params
   savefig  - save the current figure
@@ -294,7 +295,7 @@ def get_plot_commands(): return ( 'axes', 'axis', 'bar', 'cla', 'clf',
     'imshow', 'legend', 'loglog', 'rc', 'pcolor', 'plot', 'psd',
     'savefig', 'scatter', 'set', 'semilogx', 'semilogy', 'show',
     'specgram', 'stem', 'subplot', 'table', 'text', 'title', 'xlabel',
-    'ylabel')
+    'ylabel', 'polar')
 
 def raise_msg_to_str(msg):
     """msg is a return arg from a raise.  Join with new lines"""
@@ -1215,5 +1216,4 @@ def polar(*args, **kwargs):
 
 
     ax = gca(polar=True)
-    print 'polar got', ax
     return ax.plot(*args, **kwargs)

src/_backend_agg.cpp

@@ -359,6 +359,7 @@ RendererAgg::draw_poly_collection(const Py::Tuple& args) {
   theRasterizer->reset_clipping();
 
   _VERBOSE("RendererAgg::draw_poly_collection");
+
   args.verify_length(9);  
 
 
@@ -490,6 +491,7 @@ RendererAgg::draw_poly_collection(const Py::Tuple& args) {
     g = Py::Float(rgba[1]);
     b = Py::Float(rgba[2]);
     a = Py::Float(rgba[3]);
+
     if (a>0) { //only render if alpha>0
       agg::rgba edgecolor(r, g, b, a);