Revision: 8267
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=8267&view=rev
Author: efiring
Date: 2010-04-22 08:27:18 +0000 (Thu, 22 Apr 2010)
Log Message:
-----------
Axes.hist: remove unnecessary copying of input array.
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/axes.py
Modified: trunk/matplotlib/lib/matplotlib/axes.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/axes.py 2010-04-22 07:49:13 UTC (rev
8266)
+++ trunk/matplotlib/lib/matplotlib/axes.py 2010-04-22 08:27:18 UTC (rev
8267)
@@ -7289,17 +7289,16 @@
if isinstance(x, np.ndarray):
# TODO: support masked arrays;
- # Why is the copy needed?
- x = np.array(x, copy=True, subok=False)
+ x = np.asarray(x)
if x.ndim == 2:
- x = x.T
+ x = x.T # 2-D input with columns as datasets; switch to rows
elif x.ndim == 1:
- x.shape = (1, x.shape[0])
+ x = x.reshape(1, x.shape[0]) # new view, single row
else:
raise ValueError("x must be 1D or 2D")
if x.shape[1] < x.shape[0]:
- warnings.warn('2D hist input should be nsamples x nvariables; '
- 'this looks transposed')
+ warnings.warn('2D hist input should be nsamples x
nvariables;\n '
+ 'this looks transposed (shape is %d x %d)' % x.shape[::-1])
else:
# multiple hist with data of different length
x = [np.array(xi) for xi in x]
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