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Mean and standard deviation in a single pass

Added by Richard Hattersley about 12 years ago

Hi,

Is there a way to compute both the mean and the standard deviation of a dataset in a single pass?

Currently I can do:

cdo timmean ifile ofile1
cdo timstd ifile ofile2

But that requires ifile to be read twice, but ifile is big ~34GB so it takes a long time. If there's a way to compute both statistics in a single pass it would halve the run time.

Thanks,
Richard


Replies (2)

RE: Mean and standard deviation in a single pass - Added by Uwe Schulzweida almost 12 years ago

Hi Richard,

There is no way to do this task in a single pass with CDO, sorry.

Best regards,
Uwe

RE: Mean and standard deviation in a single pass - Added by Richard Hattersley almost 12 years ago

Thanks Uwe - it's good to know I've not missed something obvious!

Regards,
Richard

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