@@ -67,7 +67,9 @@ def statsreducer(key, values): minimum = min(columns.next()) maximum = max(columns.next()) mean = float(s1) / s0 - std = sqrt((s2-s1**2/float(s0))/(s0-1)) # sample standard deviation + std = 0 + if s0 > 1: + std = sqrt((s2-s1**2/float(s0))/(s0-1)) # sample standard deviation yield (key, (s0, mean, std, minimum, maximum)) dumbo/lib.py 4142a21732c5c40ff3e05299d367c726328cc759 Klaas Bosteels klaas.bosteels@gmail.com http://github.com/klbostee/dumbo/commit/4c72c4df1a8f03c44878ef036e7b9dfb677856c9 4c72c4df1a8f03c44878ef036e7b9dfb677856c9 2009-05-07T02:38:09-07:00 2009-05-07T02:38:09-07:00 Closes #26 1737bf9848df3ee08fee76561f9e66449a90431c Klaas Bosteels klaas.bosteels@gmail.com