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
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