Hi fellow developers,
I am using matplotlib in particle physics where we generally do not plot
the little end caps of error bars. They add no information, but they
make the plot harder to read, especially if it is a busy plot.
In physics, we follow the general aesthetic rule to maximise the "data
to ink ratio", which means that the information should be presented with
a minimum of optical gimmicks.
So, I end up calling errorbar everytime with capsize=0. I argue that
having end caps or not is a global style option, and therefore it makes
sense to put this into matplotlibrc.
I prepared a patch in order to do that and would like you to include it
into the distribution.
Please tell me what you think of it.
>From cbb2df219068a51ee1556a9318b39d19224bc10e Mon Sep 17 00:00:00 2001
From: Hans Dembinski <hans.dembin...@kit.edu>
Date: Thu, 9 Aug 2012 14:02:17 +0200
Subject: [PATCH] get capsize via configuration entry lines.capsize
---
lib/matplotlib/axes.py | 12 +++++++-----
lib/matplotlib/rcsetup.py | 1 +
matplotlibrc.template | 1 +
3 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/lib/matplotlib/axes.py b/lib/matplotlib/axes.py
index d2dec62..f29decb 100644
--- a/lib/matplotlib/axes.py
+++ b/lib/matplotlib/axes.py
@@ -4604,7 +4604,7 @@ class Axes(martist.Artist):
*yerr* if not None, will be used to generate
errorbars on the bar chart
*ecolor* specifies the color of any errorbar
- *capsize* (default 3) determines the length in
+ *capsize* determines the length in
points of the error bar caps
*error_kw* dictionary of kwargs to be passed to
errorbar method. *ecolor* and *capsize*
@@ -4652,7 +4652,7 @@ class Axes(martist.Artist):
yerr = kwargs.pop('yerr', None)
error_kw = kwargs.pop('error_kw', dict())
ecolor = kwargs.pop('ecolor', None)
- capsize = kwargs.pop('capsize', 3)
+ capsize = kwargs.pop('capsize', None)
error_kw.setdefault('ecolor', ecolor)
error_kw.setdefault('capsize', capsize)
@@ -4882,7 +4882,7 @@ class Axes(martist.Artist):
*yerr* if not None, will be used to generate
errorbars on the bar chart
*ecolor* specifies the color of any errorbar
- *capsize* (default 3) determines the length in
+ *capsize* determines the length in
points of the error bar caps
*align* 'edge' (default) | 'center'
*log* [False|True] False (default) leaves the
@@ -5175,14 +5175,14 @@ class Axes(martist.Artist):
@docstring.dedent_interpd
def errorbar(self, x, y, yerr=None, xerr=None,
- fmt='-', ecolor=None, elinewidth=None, capsize=3,
+ fmt='-', ecolor=None, elinewidth=None, capsize=None,
barsabove=False, lolims=False, uplims=False,
xlolims=False, xuplims=False, errorevery=1, **kwargs):
"""
Call signature::
errorbar(x, y, yerr=None, xerr=None,
- fmt='-', ecolor=None, elinewidth=None, capsize=3,
+ fmt='-', ecolor=None, elinewidth=None, capsize=None,
barsabove=False, lolims=False, uplims=False,
xlolims=False, xuplims=False)
@@ -5337,6 +5337,8 @@ class Axes(martist.Artist):
ys = [thisy for thisy, b in zip(ys, mask) if b]
return xs, ys
+ if capsize is None:
+ capsize = rcParams['lines.capsize']
if capsize > 0:
plot_kw = {
diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
index 6df1d4b..e3d3b85 100644
--- a/lib/matplotlib/rcsetup.py
+++ b/lib/matplotlib/rcsetup.py
@@ -379,6 +379,7 @@ defaultParams = {
'lines.solid_joinstyle' : ['round', validate_joinstyle],
'lines.dash_capstyle' : ['butt', validate_capstyle],
'lines.solid_capstyle' : ['projecting', validate_capstyle],
+ 'lines.capsize' : [3, validate_int],
# patch props
'patch.linewidth' : [1.0, validate_float], # line width in points
diff --git a/matplotlibrc.template b/matplotlibrc.template
index 6ebaac2..2edde14 100644
--- a/matplotlibrc.template
+++ b/matplotlibrc.template
@@ -69,6 +69,7 @@ backend : %(backend)s
#lines.solid_joinstyle : miter # miter|round|bevel
#lines.solid_capstyle : projecting # butt|round|projecting
#lines.antialiased : True # render lines in antialised (no jaggies)
+#lines.capsize : 3 # size of perpendicular lines at end of error bars
### PATCHES
# Patches are graphical objects that fill 2D space, like polygons or
--
1.7.9.5
------------------------------------------------------------------------------
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