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counterclock parameter for pie #2853

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merged 4 commits into from
Mar 17, 2014
Merged

counterclock parameter for pie #2853

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a6bbc3c
counterclock parameter for pie
fat-crocodile Feb 28, 2014
bc60879
fix style restriction failure
fat-crocodile Mar 13, 2014
73b0302
change description
fat-crocodile Mar 13, 2014
4d374d5
add description in changelog
fat-crocodile Mar 13, 2014
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2 changes: 2 additions & 0 deletions CHANGELOG
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
2014-03-13 Add parameter 'clockwise' to function pie, True by default.

2014-27-02 Implemented separate horizontal/vertical axes padding to the
ImageGrid in the AxesGrid toolkit

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2 changes: 2 additions & 0 deletions doc/api/api_changes.rst
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Expand Up @@ -144,6 +144,8 @@ original location:
tuple-like if separate axis padding is required.
The original behavior is preserved.

* Added clockwise parameter to control sectors direction in `axes.pie`


.. _changes_in_1_3:

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14 changes: 9 additions & 5 deletions lib/matplotlib/axes/_axes.py
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Expand Up @@ -2339,8 +2339,8 @@ def stem(self, *args, **kwargs):
return stem_container

def pie(self, x, explode=None, labels=None, colors=None,
autopct=None, pctdistance=0.6, shadow=False,
labeldistance=1.1, startangle=None, radius=None):
autopct=None, pctdistance=0.6, shadow=False, labeldistance=1.1,
startangle=None, radius=None, counterclock=True):
r"""
Plot a pie chart.

Expand Down Expand Up @@ -2394,6 +2394,9 @@ def pie(self, x, explode=None, labels=None, colors=None,
*radius*: [ *None* | scalar ]
The radius of the pie, if *radius* is *None* it will be set to 1.

*counterclock*: [ *False* | *True* ]
Specify fractions direction, clockwise or counterclockwise.

The pie chart will probably look best if the figure and axes are
square, or the Axes aspect is equal. e.g.::

Expand Down Expand Up @@ -2453,13 +2456,14 @@ def pie(self, x, explode=None, labels=None, colors=None,
i = 0
for frac, label, expl in cbook.safezip(x, labels, explode):
x, y = center
theta2 = theta1 + frac
theta2 = (theta1 + frac) if counterclock else (theta1 - frac)
thetam = 2 * math.pi * 0.5 * (theta1 + theta2)
x += expl * math.cos(thetam)
y += expl * math.sin(thetam)

w = mpatches.Wedge((x, y), radius, 360. * theta1, 360. * theta2,
facecolor=colors[i % len(colors)])
w = mpatches.Wedge((x, y), radius, 360. * min(theta1, theta2),
360. * max(theta1, theta2),
facecolor=colors[i % len(colors)])
slices.append(w)
self.add_patch(w)
w.set_label(label)
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