Date:         Mon, 10 Jul 2000 20:48:28 GMT
Reply-To:     yorgiv@MY-DEJA.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         yorgiv@MY-DEJA.COM
Organization: Deja.com - Before you buy.
Subject:      index variable by group

Hello friends,

I would like to find a way to create an index variable in a single data
set by a group.  An example will help of course:

A     B
5     1
3     2
12    2
8     1
1     2
2     1

then i do this:

proc sort;
      by B A;
run;
Now what I want is this:

B      A     index
1      2     1
1      5     2
1      8     3
2      1     1
2      3     2
2     12     3

I want to do this so that I can then use the ranuni function to
randomly select an A from each group of B.  But I have trouble creating
the index variable as above. Thank you for any help,

Sincerely,
Yorgi V.


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