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Add new plot style: stackplot #819

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dmcdougall wants to merge 13 commits into from
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Add new plot style: stackplot #819

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914385a
Added new plot style: stackplot.
dmcdougall Apr 7, 2012
4557573
Added stackplot example.
dmcdougall Apr 7, 2012
ff8ecde
Make docstring more helpful.
dmcdougall Apr 14, 2012
8bbac65
Make stackplot take an arbitrary number of args.
dmcdougall Apr 14, 2012
6674548
Updated stackplot example.
dmcdougall Apr 14, 2012
3e8fe6e
Update changelog to include stackplot.
dmcdougall Apr 14, 2012
38a903f
Stackplot now supports the same keyword aargs as matplotlib.Axes.fill…
dmcdougall Apr 23, 2012
91a233a
Fixed an issue where stackplot didn't fill stacked data in correct or…
dmcdougall Apr 23, 2012
7b93874
Added stackplot to list of pyplot commands.
dmcdougall Apr 23, 2012
a66ca21
Added support for custom colour cycle.
dmcdougall Apr 23, 2012
a3a35fb
Add stackplot to list of plotting commands.
dmcdougall Jun 19, 2012
0fd841c
Added stackplot unit test.
dmcdougall Jul 5, 2012
cd629e5
Removed superfluous file.
dmcdougall Jul 6, 2012
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Make stackplot take an arbitrary number of args. 
stackplot now supports taking either an MxN array of data, stacking
along axis=0, or an arbitrary number of 1xN arrays, stacking them in the
order passed.

No checks are done for the case when no the number of args is zero. An
exception should probably be raised here.

Updated docstring to explain new call signatures.
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@dmcdougall
dmcdougall committed Jun 19, 2012
commit 8bbac65f9495f487a6644f0480acce146b4d95ac
4 changes: 2 additions & 2 deletions lib/matplotlib/axes.py
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Expand Up @@ -6409,8 +6409,8 @@ def quiver(self, *args, **kw):
return q
quiver.__doc__ = mquiver.Quiver.quiver_doc

def stackplot(self, x, y):
return mstack.stackplot(self, x, y)
def stackplot(self, x, *args):
return mstack.stackplot(self, x, *args)
stackplot.__doc__ = mstack.stackplot.__doc__

def streamplot(self, x, y, u, v, density=1, linewidth=None, color=None,
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14 changes: 11 additions & 3 deletions lib/matplotlib/stackplot.py
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Expand Up @@ -12,21 +12,29 @@
__all__ = ['stackplot']


def stackplot(axes, x, y):
def stackplot(axes, x, *args):
"""Draws a stacked area plot.

Parameters
----------
*x* : 1d array of dimension N
*y* : 2d array of dimension MxN. The data is assumed to be unstacked.
*y* : 2d array of dimension MxN, OR any number 1d arrays each of dimension
1xN. The data is assumed to be unstacked. Each of the following
calls is legal:

stackplot(x, y) # where y is MxN
staclplot(x, y1, y2, y3, y4) # where y1, y2, y3, y4, are all 1xN

Returns
-------
*r* : A list of `matplotlib.collections.PolyCollection`, one for each
element in the stacked area plot.
"""

y = np.atleast_2d(y)
if len(args) == 1:
y = np.atleast_2d(*args)
elif len(args) > 1:
y = np.row_stack(args)

# Assume data passed has not been 'stacked', so stack it here.
y_stack = np.cumsum(y, axis=0)
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