[Numpy-discussion] Data standardizing

[Climate Research]

Hi
I am purely new to python and numpy..  I am using python for doing
statistical calculations to Climate data..

I  have  a  data set in the following format..

Year  Jan      feb       Mar    Apr.................   Dec
1900  1000    1001       ,        ,                         ,
1901  1011    1012       ,        ,                         ,
1902  1009    1007       ,                                  ,
,,,,        ,           '          ,        ,                         ,
,,,,        ,           ,
2010  1008    1002       ,        ,                         ,

I actually want to standardize each of these values with corresponding
standard deviations for  each monthly data column..
I have found out the standard deviations for each column..  but now i need
to  find the standared deviation  only for a prescribed mean value
ie,  when i am finding the standared deviation for the January data
column..  the mean should be calculated only for the january data, say from
1950-1970. With this mean  i  want to calculate the SD  for entire column.
Any help will be appreciated..
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