From fe0ea168f3310f89635b3eb191a30c9a65afb2bd Mon Sep 17 00:00:00 2001
From: Tim Holy <tim.holy@gmail.com>
Date: Fri, 8 Sep 2017 03:18:46 -0500
Subject: [PATCH] histogram: ensure the number of bins is finite

---
 src/recipes.jl   | 2 +-
 test/runtests.jl | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/recipes.jl b/src/recipes.jl
index 61d3de87..876b3897 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -501,7 +501,7 @@ wand_edges(x...) = (warn("Load the StatPlots package in order to use :wand bins.
 
 function _auto_binning_nbins{N}(vs::NTuple{N,AbstractVector}, dim::Integer; mode::Symbol = :auto)
     _cl(x) = ceil(Int, NaNMath.max(x, one(x)))
-    _iqr(v) = quantile(v, 0.75) - quantile(v, 0.25)
+    _iqr(v) = (q = quantile(v, 0.75) - quantile(v, 0.25); q > 0 ? q : oftype(q, 1))
     _span(v) = ignorenan_maximum(v) - ignorenan_minimum(v)
 
     n_samples = length(linearindices(first(vs)))
diff --git a/test/runtests.jl b/test/runtests.jl
index da7fcb05..3f471735 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -129,6 +129,9 @@ end
     @test Plots.ignorenan_extrema(axis) == (0.5, 7.5)
 end
 
+@testset "NoFail" begin
+    histogram([1, 0, 0, 0, 0, 0])
+end
 
 # tests for preprocessing recipes