Merge pull request #1984 from mdboom/rgb_to_hsv

pelson · pelson · commit 4fd36dacdc8c · 2013-05-08T01:41:15.000-07:00
colors.rgb_to_hsv does not work properly with array of int dtype
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -1221,7 +1221,7 @@ def rgb_to_hsv(arr):
     convert rgb values in a numpy array to hsv values
     input and output arrays should have shape (M,N,3)
     """
-    out = np.zeros_like(arr)
+    out = np.zeros(arr.shape, dtype=np.float)
     arr_max = arr.max(-1)
     ipos = arr_max > 0
     delta = arr.ptp(-1)
