Revision: 6743
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6743&view=rev
Author: jdh2358
Date: 2009-01-06 17:06:06 +0000 (Tue, 06 Jan 2009)
Log Message:
-----------
added marginal density option to hexbin
Modified Paths:
--------------
trunk/matplotlib/CHANGELOG
trunk/matplotlib/boilerplate.py
trunk/matplotlib/examples/pylab_examples/hexbin_demo2.py
trunk/matplotlib/lib/matplotlib/axes.py
trunk/matplotlib/setupext.py
Modified: trunk/matplotlib/CHANGELOG
===================================================================
--- trunk/matplotlib/CHANGELOG 2009-01-06 16:53:09 UTC (rev 6742)
+++ trunk/matplotlib/CHANGELOG 2009-01-06 17:06:06 UTC (rev 6743)
@@ -1,3 +1,6 @@
+2009-01-06 Added marginals kwarg to hexbin to plot marginal densities
+ JDH
+
2009-01-06 Change user-visible multipage pdf object to PdfPages to
avoid accidents with the file-like PdfFile. - JKS
Modified: trunk/matplotlib/boilerplate.py
===================================================================
--- trunk/matplotlib/boilerplate.py 2009-01-06 16:53:09 UTC (rev 6742)
+++ trunk/matplotlib/boilerplate.py 2009-01-06 17:06:06 UTC (rev 6743)
@@ -102,7 +102,7 @@
cmappable = {
'contour' : 'if ret._A is not None: gci._current = ret',
'contourf': 'if ret._A is not None: gci._current = ret',
- 'hexbin' : 'gci._current = ret',
+ 'hexbin' : 'gci._current = ret[0]',
'scatter' : 'gci._current = ret',
'pcolor' : 'gci._current = ret',
'pcolormesh' : 'gci._current = ret',
Modified: trunk/matplotlib/examples/pylab_examples/hexbin_demo2.py
===================================================================
--- trunk/matplotlib/examples/pylab_examples/hexbin_demo2.py 2009-01-06
16:53:09 UTC (rev 6742)
+++ trunk/matplotlib/examples/pylab_examples/hexbin_demo2.py 2009-01-06
17:06:06 UTC (rev 6743)
@@ -39,13 +39,14 @@
gridsize=30
plt.subplot(211)
-plt.hexbin(x,y, C=z, gridsize=gridsize )
+plt.hexbin(x,y, C=z, gridsize=gridsize, marginals=True)
plt.axis([xmin, xmax, ymin, ymax])
cb = plt.colorbar()
cb.set_label('mean value')
+
plt.subplot(212)
-plt.hexbin(x,y, gridsize=gridsize )
+plt.hexbin(x,y, gridsize=gridsize)
plt.axis([xmin, xmax, ymin, ymax])
cb = plt.colorbar()
cb.set_label('N observations')
Modified: trunk/matplotlib/lib/matplotlib/axes.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/axes.py 2009-01-06 16:53:09 UTC (rev
6742)
+++ trunk/matplotlib/lib/matplotlib/axes.py 2009-01-06 17:06:06 UTC (rev
6743)
@@ -5212,7 +5212,7 @@
xscale = 'linear', yscale = 'linear',
cmap=None, norm=None, vmin=None, vmax=None,
alpha=1.0, linewidths=None, edgecolors='none',
- reduce_C_function = np.mean, mincnt=None,
+ reduce_C_function = np.mean, mincnt=None, marginals=True,
**kwargs):
"""
call signature::
@@ -5221,7 +5221,7 @@
xscale = 'linear', yscale = 'linear',
cmap=None, norm=None, vmin=None, vmax=None,
alpha=1.0, linewidths=None, edgecolors='none'
- reduce_C_function = np.mean, mincnt=None,
+ reduce_C_function = np.mean, mincnt=None, marginals=True
**kwargs)
Make a hexagonal binning plot of *x* versus *y*, where *x*,
@@ -5273,6 +5273,11 @@
If not None, only display cells with more than *mincnt*
number of points in the cell
+ *marginals*: True|False
+ if marginals is True, plot the marginal density as
+ colormapped rectagles along the bottom of the x-axis and
+ left of the y-axis
+
Other keyword arguments controlling color mapping and normalization
arguments:
@@ -5320,8 +5325,11 @@
:class:`~matplotlib.collections.PolyCollection` instance; use
:meth:`~matplotlib.collection.PolyCollection.get_array` on
this :class:`~matplotlib.collections.PolyCollection` to get
- the counts in each hexagon.
+ the counts in each hexagon.. If marginals is True, horizontal
+ bar and vertical bar (both PolyCollections) will be attached
+ to the return collection as attributes *hbar* and *vbar*
+
**Example:**
.. plot:: mpl_examples/pylab_examples/hexbin_demo.py
@@ -5331,8 +5339,10 @@
self._process_unit_info(xdata=x, ydata=y, kwargs=kwargs)
+
x, y, C = cbook.delete_masked_points(x, y, C)
+
# Set the size of the hexagon grid
if iterable(gridsize):
nx, ny = gridsize
@@ -5357,6 +5367,11 @@
xmax += padding
sx = (xmax-xmin) / nx
sy = (ymax-ymin) / ny
+
+ if marginals:
+ xorig = x.copy()
+ yorig = y.copy()
+
x = (x-xmin)/sx
y = (y-ymin)/sy
ix1 = np.round(x).astype(int)
@@ -5496,6 +5511,93 @@
# add the collection last
self.add_collection(collection)
+ if not marginals:
+ return collection
+
+
+ if C is None:
+ C = np.ones(len(x))
+
+ def coarse_bin(x, y, coarse):
+ ind = coarse.searchsorted(x).clip(0, len(coarse)-1)
+ mus = np.zeros(len(coarse))
+ for i in range(len(coarse)):
+ mu = reduce_C_function(y[ind==i])
+ mus[i] = mu
+ return mus
+
+ coarse = np.linspace(xmin, xmax, gridsize)
+
+ xcoarse = coarse_bin(xorig, C, coarse)
+ valid = ~np.isnan(xcoarse)
+ verts, values = [], []
+ for i,val in enumerate(xcoarse):
+ thismin = coarse[i]
+ if i<len(coarse)-1:
+ thismax = coarse[i+1]
+ else:
+ thismax = thismin + np.diff(coarse)[-1]
+
+ if not valid[i]: continue
+
+ verts.append([(thismin, 0), (thismin, 0.05), (thismax, 0.05),
(thismax, 0)])
+ values.append(val)
+
+ values = np.array(values)
+ trans = mtransforms.blended_transform_factory(
+ self.transData, self.transAxes)
+
+
+ hbar = mcoll.PolyCollection(verts, transform=trans, edgecolors='face')
+
+ hbar.set_array(values)
+ hbar.set_cmap(cmap)
+ hbar.set_norm(norm)
+ hbar.set_alpha(alpha)
+ hbar.update(kwargs)
+ self.add_collection(hbar)
+
+ coarse = np.linspace(ymin, ymax, gridsize)
+ ycoarse = coarse_bin(yorig, C, coarse)
+ valid = ~np.isnan(ycoarse)
+ verts, values = [], []
+ for i,val in enumerate(ycoarse):
+ thismin = coarse[i]
+ if i<len(coarse)-1:
+ thismax = coarse[i+1]
+ else:
+ thismax = thismin + np.diff(coarse)[-1]
+ if not valid[i]: continue
+ verts.append([(0, thismin), (0.0, thismax), (0.05, thismax),
(0.05, thismin)])
+ values.append(val)
+
+ values = np.array(values)
+
+
+ trans = mtransforms.blended_transform_factory(
+ self.transAxes, self.transData)
+
+ vbar = mcoll.PolyCollection(verts, transform=trans, edgecolors='face')
+ vbar.set_array(values)
+ vbar.set_cmap(cmap)
+ vbar.set_norm(norm)
+ vbar.set_alpha(alpha)
+ vbar.update(kwargs)
+ self.add_collection(vbar)
+
+
+
+ collection.hbar = hbar
+ collection.vbar = vbar
+
+ def on_changed(collection):
+ hbar.set_cmap(collection.get_cmap())
+ hbar.set_clim(collection.get_clim())
+ vbar.set_cmap(collection.get_cmap())
+ vbar.set_clim(collection.get_clim())
+
+ collection.callbacksSM.connect('changed', on_changed)
+
return collection
hexbin.__doc__ = cbook.dedent(hexbin.__doc__) % martist.kwdocd
Modified: trunk/matplotlib/setupext.py
===================================================================
--- trunk/matplotlib/setupext.py 2009-01-06 16:53:09 UTC (rev 6742)
+++ trunk/matplotlib/setupext.py 2009-01-06 17:06:06 UTC (rev 6743)
@@ -1066,8 +1066,7 @@
global BUILT_WINDOWING
if BUILT_WINDOWING: return # only build it if you you haven't already
module = Extension('matplotlib._windowing',
- ['src/_windowing.cpp',
- ],
+ ['src/_windowing.cpp'],
)
add_windowing_flags(module)
ext_modules.append(module)
@@ -1341,7 +1340,7 @@
temp_copy('src/_backend_gdk.c', 'src/backend_gdk.c')
module = Extension(
'matplotlib.backends._backend_gdk',
- ['src/backend_gdk.c', ],
+ ['src/backend_gdk.c'],
libraries = [],
include_dirs=numpy_inc_dirs,
)
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