Revision: 6936
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6936&view=rev
Author: efiring
Date: 2009-02-26 00:12:33 +0000 (Thu, 26 Feb 2009)
Log Message:
-----------
Improve tick location subsetting in FixedLocator.
Now it includes zero, if present.
Modified Paths:
--------------
trunk/matplotlib/CHANGELOG
trunk/matplotlib/lib/matplotlib/ticker.py
Modified: trunk/matplotlib/CHANGELOG
===================================================================
--- trunk/matplotlib/CHANGELOG 2009-02-25 15:45:45 UTC (rev 6935)
+++ trunk/matplotlib/CHANGELOG 2009-02-26 00:12:33 UTC (rev 6936)
@@ -1,4 +1,6 @@
-2009-02-25 Deprecate numerix, and strip out all but the numpy
+2009-02-25 Improve tick location subset choice in FixedLocator. - EF
+
+2009-02-24 Deprecate numerix, and strip out all but the numpy
part of the code. - EF
2009-02-21 Improve scatter argument handling; add an early error
Modified: trunk/matplotlib/lib/matplotlib/ticker.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/ticker.py 2009-02-25 15:45:45 UTC (rev
6935)
+++ trunk/matplotlib/lib/matplotlib/ticker.py 2009-02-26 00:12:33 UTC (rev
6936)
@@ -708,10 +708,14 @@
Tick locations are fixed. If nbins is not None,
the array of possible positions will be subsampled to
keep the number of ticks <= nbins +1.
+ The subsampling will be done so as to include the smallest
+ absolute value; for example, if zero is included in the
+ array of possibilities, then it is guaranteed to be one of
+ the chosen ticks.
"""
def __init__(self, locs, nbins=None):
- self.locs = locs
+ self.locs = np.asarray(locs)
self.nbins = nbins
if self.nbins is not None:
self.nbins = max(self.nbins, 2)
@@ -721,7 +725,12 @@
if self.nbins is None:
return self.locs
step = max(int(0.99 + len(self.locs) / float(self.nbins)), 1)
- return self.locs[::step]
+ ticks = self.locs[::step]
+ for i in range(1,step):
+ ticks1 = self.locs[i::step]
+ if np.absolute(ticks1).min() < np.absolute(ticks).min():
+ ticks = ticks1
+ return ticks
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