[Numpy-discussion] Newbie Installation problems
Chris Barker
chrishbarker at home.net
Tue Aug 28 13:40:10 EDT 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
--
Christopher Barker,
Ph.D.
ChrisHBarker at home.net --- --- ---
http://members.home.net/barkerlohmann ---@@ -----@@ -----@@
------@@@ ------@@@ ------@@@
Oil Spill Modeling ------ @ ------ @ ------ @
Water Resources Engineering ------- --------- --------
Coastal and Fluvial Hydrodynamics --------------------------------------
------------------------------------------------------------------------
More information about the NumPy-Discussion
mailing list