[Numpy-discussion] Newbie Installation problems
Chris Barker
chrishbarker at home.net
Tue Aug 28 12:40:10 CDT 2001
Charles G Waldman wrote:
> I think there are some statistics modules floating around on the Net,
> but mean and standard deviation are one-liners in NumPy:
>
> from Numeric import *
>
> def mean(a):
> return float(sum(a))/len(a)
>
> def std_dev(a):
> return sqrt(mean((a-mean(a))**2))
or, for the unbiased estimate:
def std_dev(a):
return sqrt(sum((a-mean(a))**2)/(len(a)-1))
You can also find these in Mlab.py
-Chris
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Christopher Barker,
Ph.D.
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