Date:         Thu, 23 Aug 2007 09:44:48 -0700
Reply-To:     aarcus@OEHHA.CA.GOV
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         aarcus@OEHHA.CA.GOV
Organization: http://groups.google.com
Subject:      help
Comments: To: sas-l@uga.edu
Comments: cc: amy_email_1@yahoo.com
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Help!  I have a dataset with 1000 obs (persons), each having 300
measurements (e.g., meas1-meas300) of the same outcome (e.g. intake of
nutrient) taken at differing intervals.  The dataset includes the
interval of time between each measurement (inteval1-interval299).  I
want to sum the intervals for each person (ie, acroos each row) until
the sum reaches a certain amount of time (ie, 3000 days).  Then I need
to sum the measurements for each person up to the measurement at the
summed interval of 3000 days.  I have tried using arrays and summing
each row using:
sum(of old(1) - old(i)) with no success.  Likewise with:
"suminteval = new(i) + new(i-1)".  Any ideas??  Do I need to tranpsose
the data??  I would very much appreciate any help!!