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Re: st: Cummulative sum & dealing with time


From   Robert A Yaffee <bob.yaffee@nyu.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Cummulative sum & dealing with time
Date   Thu, 05 May 2005 12:04:01 -0400

Kelly,
  You may want to use
generate cumsum = sum(Var1)
and for the other problem,
search for tsmktim
  - Regards,
     Bob Yaffee


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Apt 19-W
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07024-3171
Phone: 201-242-3824
Fax: 201-242-3825
yaffee@nyu.edu

----- Original Message -----
From: kelly johnson <econometrics@hotmail.com>
Date: Thursday, May 5, 2005 8:37 am
Subject: st: Cummulative sum & dealing with time

> hi,
> 
> how do i genrate a cummulative sum for a variable. eg. my data 
> looks like 
> this
> 
> date time Var1
> 
> i want to create a new variable that is a running sum of Var1 (eg. 
> the first 
> obs is the same, the second obs= the first  obs + the second obs, 
> etc.).
> also, what is the best way to deal with time? i have a date in the 
> mm/dd/yy 
> formate and the minites of the date in hh:mm format. what is the 
> best way to 
> format and use my time variable.
> 
> thanks,
> 
> kelly
> 
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