From 5b60046f674d0e26cde8d31f4e999c30216b1cf4 Mon Sep 17 00:00:00 2001
From: Thomas A Caswell <tcaswell@gmail.com>
Date: Thu, 16 Jan 2014 12:40:26 -0500
Subject: [PATCH] BUG : errorbar does not respect `lines.linestyle` rcparam

changed default value of `fmt` from '-' -> ''

fixes issue #2366

Fix that does minimal amount of reverse compatible breakage.
I think the only scenario where this will be a problem are cases
where users have set a non-default value for `lines.linestyle`, but
do not want the lines drawn by `errorbar` to respect that.  I think that
this use case is broken because `lines.linestyle` should be respected by
plotting functions which draw lines.
---
 CHANGELOG                |  3 +++
 doc/api/api_changes.rst  | 10 ++++++++++
 lib/matplotlib/axes.py   |  3 +--
 lib/matplotlib/pyplot.py |  2 +-
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 8d2c91c224cb..96bb0dde1ad7 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+2014-01-15 changed default value of `fmt` kwarg of `errorbar` from '-' -> '' so
+	   that `errorbar` will respect `lines.linestyle` for drawing the line.
+
 2013-05-18 Added support for arbitrary rasterization resolutions to the
            SVG backend. Previously the resolution was hard coded to 72
            dpi. Now the backend class takes a image_dpi argument for
diff --git a/doc/api/api_changes.rst b/doc/api/api_changes.rst
index ed6803131d75..c791d887da7d 100644
--- a/doc/api/api_changes.rst
+++ b/doc/api/api_changes.rst
@@ -17,6 +17,16 @@ For new features that were added to matplotlib, please see
 Changes in 1.3.x
 ================
 
+* changed default value of `fmt` kwarg of `errorbar` from `'-'` to
+  `''` so that `errorbar` will respect `lines.linestyle` for drawing
+  the line.  I think the only scenario where this will break reverse
+  compatibility is cases where users have set a non-default value for
+  `lines.linestyle`, but do not want the lines drawn by `errorbar` to
+  respect that.  I think that this use case is broken because
+  `lines.linestyle` should be respected by plotting functions which
+  draw lines.
+
+
 Changes in 1.3.1
 ----------------
 
diff --git a/lib/matplotlib/axes.py b/lib/matplotlib/axes.py
index db671e7967c2..d3c2d3c9dd22 100644
--- a/lib/matplotlib/axes.py
+++ b/lib/matplotlib/axes.py
@@ -5484,7 +5484,7 @@ def pie(self, x, explode=None, labels=None, colors=None,
 
     @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=3,
                  barsabove=False, lolims=False, uplims=False,
                  xlolims=False, xuplims=False, errorevery=1, capthick=None,
                  **kwargs):
@@ -5586,7 +5586,6 @@ def errorbar(self, x, y, yerr=None, xerr=None,
         .. plot:: mpl_examples/statistics/errorbar_demo.py
 
         """
-
         if errorevery < 1:
             raise ValueError(
                 'errorevery has to be a strictly positive integer')
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
index 3300183aae2f..20219e664be6 100644
--- a/lib/matplotlib/pyplot.py
+++ b/lib/matplotlib/pyplot.py
@@ -2679,7 +2679,7 @@ def csd(x, y, NFFT=256, Fs=2, Fc=0, detrend=mlab.detrend_none,
 # This function was autogenerated by boilerplate.py.  Do not edit as
 # changes will be lost
 @_autogen_docstring(Axes.errorbar)
-def errorbar(x, y, yerr=None, xerr=None, fmt='-', ecolor=None, elinewidth=None,
+def errorbar(x, y, yerr=None, xerr=None, fmt='', ecolor=None, elinewidth=None,
              capsize=3, barsabove=False, lolims=False, uplims=False,
              xlolims=False, xuplims=False, errorevery=1, capthick=None,
              hold=None, **kwargs):