From 87031984d980a920afda633000dc2a97d4c361d8 Mon Sep 17 00:00:00 2001
From: Thomas Breloff <tom@breloff.com>
Date: Fri, 27 May 2016 00:14:22 -0400
Subject: [PATCH] widen gr limits; fixes #265

---
 src/backends/gr.jl | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/backends/gr.jl b/src/backends/gr.jl
index 87c5f753..4536d2c4 100644
--- a/src/backends/gr.jl
+++ b/src/backends/gr.jl
@@ -266,17 +266,24 @@ end
 #     zmin, zmax
 # end
 
+function widen(lims)
+    lmin, lmax = lims
+    span = lmax - lmin
+    eps = max(1e-16, min(1e-2span, 1e-10))
+    lmin-eps, lmax+eps
+end
+
 # using the axis extrema and limit overrides, return the min/max value for this axis
-gr_x_axislims(sp::Subplot) = axis_limits(sp.attr[:xaxis])
-gr_y_axislims(sp::Subplot) = axis_limits(sp.attr[:yaxis])
-gr_z_axislims(sp::Subplot) = axis_limits(sp.attr[:zaxis])
+gr_x_axislims(sp::Subplot) = widen(axis_limits(sp.attr[:xaxis]))
+gr_y_axislims(sp::Subplot) = widen(axis_limits(sp.attr[:yaxis]))
+gr_z_axislims(sp::Subplot) = widen(axis_limits(sp.attr[:zaxis]))
 gr_xy_axislims(sp::Subplot) = gr_x_axislims(sp)..., gr_y_axislims(sp)...
 
 function gr_lims(axis::Axis, adjust::Bool, expand = nothing)
     if expand != nothing
         expand_extrema!(axis, expand)
     end
-    lims = axis_limits(axis)
+    lims = widen(axis_limits(axis))
     if adjust
         GR.adjustrange(lims...)
     else