From de63203a32c9ce24cb1cd090a232c47833476dfd Mon Sep 17 00:00:00 2001
From: Stefan van der Walt <stefan@sun.ac.za>
Date: Fri, 9 Feb 2007 17:55:37 +0000
Subject: Do not attempt to convolve empty arrays.

---
 numpy/core/numeric.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'numpy/core/numeric.py')

diff --git a/numpy/core/numeric.py b/numpy/core/numeric.py
index 4329cae5c..b56dfbc44 100644
--- a/numpy/core/numeric.py
+++ b/numpy/core/numeric.py
@@ -219,8 +219,11 @@ def convolve(a,v,mode='full'):
     """Returns the discrete, linear convolution of 1-D sequences a and v; mode
     can be 'valid', 'same', or 'full' to specify size of the resulting sequence.
     """
+    a,v = array(a,ndmin=1),array(v,ndmin=1)
     if (len(v) > len(a)):
         a, v = v, a
+    assert len(a) > 0, 'a cannot be empty'
+    assert len(v) > 0, 'v cannot be empty'
     mode = _mode_from_name(mode)
     return multiarray.correlate(a,asarray(v)[::-1],mode)
 
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