From 65173e6dd2de3c605bb0a382c2ffca32e0da482f Mon Sep 17 00:00:00 2001
From: Daniel Schwabeneder <daschw@disroot.org>
Date: Thu, 2 May 2019 12:48:06 +0200
Subject: [PATCH] fix recipe error

---
 src/backends/gr.jl     |  4 ++--
 src/backends/pyplot.jl | 16 +++++++++-------
 src/utils.jl           |  4 +++-
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/src/backends/gr.jl b/src/backends/gr.jl
index 69b278fd..e9aea7d5 100644
--- a/src/backends/gr.jl
+++ b/src/backends/gr.jl
@@ -784,7 +784,7 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
             tbx, tby = gr_inqtext(0, 0, string(lab))
             legendw = max(legendw, tbx[3] - tbx[1])
         end
-        
+
         GR.setscale(1)
         GR.selntran(1)
         GR.restorestate()
@@ -1139,7 +1139,7 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
         end
 
         if st in (:path, :scatter, :straightline)
-            if length(x) > 1
+            if x != nothing && length(x) > 1
                 lz = series[:line_z]
                 segments = iter_segments(series)
                 # do area fill
diff --git a/src/backends/pyplot.jl b/src/backends/pyplot.jl
index 3618412f..624c01f9 100644
--- a/src/backends/pyplot.jl
+++ b/src/backends/pyplot.jl
@@ -216,13 +216,15 @@ end
 # ---------------------------------------------------------------------------
 
 function fix_xy_lengths!(plt::Plot{PyPlotBackend}, series::Series)
-    x, y = series[:x], series[:y]
-    nx, ny = length(x), length(y)
-    if !isa(get(series.plotattributes, :z, nothing), Surface) && nx != ny
-        if nx < ny
-            series[:x] = Float64[x[mod1(i,nx)] for i=1:ny]
-        else
-            series[:y] = Float64[y[mod1(i,ny)] for i=1:nx]
+    if series[:x] != nothing
+        x, y = series[:x], series[:y]
+        nx, ny = length(x), length(y)
+        if !isa(get(series.plotattributes, :z, nothing), Surface) && nx != ny
+            if nx < ny
+                series[:x] = Float64[x[mod1(i,nx)] for i=1:ny]
+            else
+                series[:y] = Float64[y[mod1(i,ny)] for i=1:nx]
+            end
         end
     end
 end
diff --git a/src/utils.jl b/src/utils.jl
index 2d8172f5..6a8cb81e 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -194,7 +194,9 @@ end
 
 function iter_segments(series::Series)
     x, y, z = series[:x], series[:y], series[:z]
-    if has_attribute_segments(series)
+    if x == nothing
+        return UnitRange{Int}[]
+    elseif has_attribute_segments(series)
         if series[:seriestype] in (:scatter, :scatter3d)
             return [[i] for i in 1:length(y)]
         else