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st: using creat count id on var


From   "Richard Hiscock" <rhiscock@netspace.net.au>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: using creat count id on var
Date   Mon, 28 Feb 2005 06:34:15 +1100

Thanks Nick for your reply
Im obviously finding it difficult to develop in this area
I cant find a useful guide,any pointers?

My problem now is that having identified the visitno within id I wish to perform manipulations on a variable. For example
using the illustrated structure.
To obtain the maximum value of var1 within id at each level of visitno.
To obtain the mean value of var1 within id at each level of visitno

id date visitno var1

    1        16267         1             53
    1        16267         1            106
    1        16267         1            84
    1        16267         1            90
    1        16267         1            76
    1        16267         1            65
    1        16298         2             87
    1        16298         2            76
    2        15678         1            98
    2        15678         1            98
    2         16541        2            150




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