I am not clear where you are starting from, but
two tips are to master -by:- and to look at -egen, seq()-.
Explanations of -by:- appear in various places in
the manual, so start with the Index. An overview
was given in
How to move step by: step. Stata Journal 2(1): 86-102 (2002)
explains the use of the by varlist : construct to tackle
a variety of problems with group structure, ranging from
simple calculations for each of several groups to more
advanced manipulations that use the built-in _n and _N
Nick
[email protected]
Jeff NASTERNAK
> Thank you to Steve B., Clint T., & Nick C. for all of your
> very informative
> help on the transposing from long to wide. I have another
> question regarding
> an obs array. Is there an easier way to write the number of
> obs for an ID
> when the ID's obs vary in frequency. With a list of over a
> hundred IDs, I
> was thinking there must be a way to make an array to fill them in.
> EX: ID obs prate
> 1 1 .2
> 1 2 .6
> 1 3 .4
> 2 1 .7
> 2 2 .7
> 3 1 .4
> 3 2 .6
> 3 3 .9
> 3 4 .2
> 3 5 .6
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