IT's a "wide" dataset...subjects completed up to 200 items in a task, and we recorded the number of seconds it took to complete each item. I can create a sum of the total number of items completed and total time; now I want to find out how many items each individual completed in 60, 90, and 120 seconds. Does that help?
Amanda L. Botticello, PhD, MPH
Outcomes Research Scientist
Kessler Medical Rehabilitation Research and Education Center
Assistant Professor
Department of Physical Medicine & Rehabilitation
UMDNJ-New Jersey Medical School
1199 Pleasant Valley Way
West Orange, NJ 07052
phone: (973)243-6973
email: [email protected]
>>> "Martin Weiss" <[email protected]> 11/9/2008 11:00 AM >>>
Well, if you want the running sum, look at -help sum()-. But maybe you could
give us a peek at your data structure, that would assist in answering your
question...
HTH
Martin
_______________________
----- Original Message -----
From: "Amanda Botticello" <[email protected]>
To: <[email protected]>
Sent: Sunday, November 09, 2008 3:12 PM
Subject: st: sum across observations until a certain cutpoint
>I have a dataset of test items and the time (in seconds)to complete each
>item. I need to create a variable that sums the time variables up to a
>certain number -- i.e., 60, 90, 120 seconds. Is there a way I can use the
>egen newvar = rowtot (time*) command to count up to 60 seconds, etc?
>
>
>
>
> Amanda L. Botticello, PhD, MPH
> Outcomes Research Scientist
> Kessler Medical Rehabilitation Research and Education Center
> Assistant Professor
> Department of Physical Medicine & Rehabilitation
> UMDNJ-New Jersey Medical School
>
> 1199 Pleasant Valley Way
> West Orange, NJ 07052
> phone: (973)243-6973
> email: [email protected]
>
>
>
> The information in this transmission is intended for official use of the
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