Hello R users,

I have a montly time series over a several year period.
It's easy to compute a monthly climatology (12 values), Now, I would like to
calculate the corresponding standard deviation, ie the 12 values
calculated from the january values, february values, etc.
What's the best way for such a calculation ?
Regards,
Yogesh

-- 
Yogesh K. Tiwari (Dr.rer.nat),
Scientist,
Indian Institute of Tropical Meteorology,
Homi Bhabha Road,
Pashan,
Pune-411008
INDIA

Phone: 0091-99 2273 9513 (Cell)
: 0091-20-258 93 600 (O) (Ext.250)
Fax : 0091-20-258 93 825

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