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Wed Feb 25 14:23:45 EST 2004 · https://mail.python.org/pipermail/python-dev/2004-February/042763.html

Raymond,

You asked:

> * Is there a way to compute the standard deviation without multiple
> passes over the data (one to compute the mean and a second to sum the
> squares of the differences from the mean?
> 
> 

I do not understand the problem in getting stdev in a single pass. 
Perhaps I not understood your problem. If you have a series of values 
you merely have to calculate their sum and sum-of-squares and use the 
usual formula.

Ignore this if this is dumb.

-- 
Prof G A Vignaux	
Mathematical and Computing Sciences,
Victoria University, PO Box 600,	   	Work: +64 4 463 5276
Wellington, NZ				  	Home: +64 4 934 7851
Tony.Vignaux.Remove_This_Bit at mcs.vuw.ac.nz 	Mobile: +64 21 89 7851
http://www.mcs.vuw.ac.nz/~vignaux

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[Python-Dev] Accumulation module