Add note about sign(nan) to release doc.

charris · charris · commit 523a237e73e0 · 2009-03-11T03:50:09.000Z
diff --git a/doc/release/1.3.0-notes.rst b/doc/release/1.3.0-notes.rst
@@ -51,6 +51,12 @@ arguments is a nan, then nan is retured. This affects np.min/np.max, amin/amax
 and the array methods max/min. New ufuncs fmax and fmin have been added to deal
 with non-propagating nans.
 
+Nan handling in sign
+~~~~~~~~~~~~~~~~~~~~
+
+The ufunc sign now returns nan for the sign of anan.
+
+
 New ufuncs
 ~~~~~~~~~~
 
