Hi all, there seems to be a bug in in pyplot.hist when using histtype="step".
I am plotting the attached data to a histogram (see 1.png). In this case I set the limits on the y axis manually.
When I don't do this (let the hist function choose the limits), I get the picture in the file 2.png. Only the highest bin is drawn. To be exact, ymin=second highest value, ymax=highest value.
To solve this, I suggest the patch in the attachment.I also removed the for loop here, because I don't see why 0 height bins should be filtered out (but this is just a suggestion).
cheers, Detlef Maurel
<<attachment: 1.png>>
<<attachment: 2.png>>
>From c38cc7146d85a6b43a0ecb6013c10e0789bb3a1f Mon Sep 17 00:00:00 2001
From: Detlef Maurel <det...@maurel.de>
Date: Tue, 16 Apr 2013 11:45:38 +0200
Subject: [PATCH] fix y axis range for histogram in step mode
---
lib/matplotlib/axes.py | 5 +----
1 files changed, 1 insertions(+), 4 deletions(-)
diff --git a/lib/matplotlib/axes.py b/lib/matplotlib/axes.py
index 2c06ff8..72b7a50 100644
--- a/lib/matplotlib/axes.py
+++ b/lib/matplotlib/axes.py
@@ -8456,10 +8456,7 @@ class Axes(martist.Artist):
elif orientation == 'vertical':
ymin0 = max(_saved_bounds[1]*0.9, minimum)
ymax = self.dataLim.intervaly[1]
- for m in n:
- ymin = np.amin(m[m != 0]) # filter out the 0 height bins
- ymin = max(ymin*0.9, minimum)
- ymin = min(ymin0, ymin)
+ ymin = min(ymin0, np.min(n))
self.dataLim.intervaly = (ymin, ymax)
if label is None:
--
1.7.4.1
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