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Re: st: Cummulative sum & dealing with time

From   Richard Goldstein <>
Subject   Re: st: Cummulative sum & dealing with time
Date   Thu, 05 May 2005 09:18:35 -0400

for your first question, sound like you want the -sum- function (NOT the egen version); see -functions- in the manual or the help


kelly johnson wrote:


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.


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