From df6e1accbd57ee6f44ae01edc7134069939f0b0a Mon Sep 17 00:00:00 2001
From: Benjamin Root <ben.v.root@gmail.com>
Date: Wed, 7 Oct 2015 15:11:24 -0400
Subject: [PATCH] Apply asanyarray to arguments for pcolor and family

---
 lib/matplotlib/axes/_axes.py      |  4 ++--
 lib/matplotlib/tests/test_axes.py | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 97e5e55d90ac..e9f0c9b75893 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -4982,7 +4982,7 @@ def _pcolorargs(funcname, *args, **kw):
         allmatch = kw.pop("allmatch", False)
 
         if len(args) == 1:
-            C = args[0]
+            C = np.asanyarray(args[0])
             numRows, numCols = C.shape
             if allmatch:
                 X, Y = np.meshgrid(np.arange(numCols), np.arange(numRows))
@@ -4992,7 +4992,7 @@ def _pcolorargs(funcname, *args, **kw):
             return X, Y, C
 
         if len(args) == 3:
-            X, Y, C = args
+            X, Y, C = [np.asanyarray(a) for a in args]
             numRows, numCols = C.shape
         else:
             raise TypeError(
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index f254e17b7449..ca0bd494a5d0 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -738,6 +738,21 @@ def test_symlog2():
     ax.set_ylim(-0.1, 0.1)
 
 
+@cleanup
+def test_pcolorargs():
+    # Smoketest to catch issue found in gh:5205
+    x = [-1.5, -1.0, -0.5, 0.0, 0.5, 1.0, 1.5]
+    y = [-1.5, -1.25, -1.0, -0.75, -0.5, -0.25, 0,
+         0.25, 0.5, 0.75, 1.0, 1.25, 1.5]
+    X, Y = np.meshgrid(x, y)
+    Z = np.hypot(X, Y)
+
+    plt.pcolor(Z)
+    plt.pcolor(list(Z))
+    plt.pcolor(x, y, Z)
+    plt.pcolor(X, Y, list(Z))
+
+
 @image_comparison(baseline_images=['pcolormesh'], remove_text=True)
 def test_pcolormesh():
     n = 12