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st: RE: hours and minutes help


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: hours and minutes help
Date   Mon, 1 Dec 2003 17:52:21 -0000

I wouldn't use -egenmore- here, as 
an attack from first principles is more direct. 

gen endtime2 = floor(endtime) + mod(endtime,1) / 60 
gen starttime2 = floor(starttime) + mod(starttime,1) / 60 
gen lapse = endtime2 - starttime2 

Nick 
n.j.cox@durham.ac.uk 

SURAN, LUCIANA
> 
> I was wondering if any of you know of a method for creating 
> 2 new variables from 1 variable, with 1 of the new 
> variables containing whole numbers and the second new 
> variable containing the numbers after a decimal point.
> 
> I am asking this because I have time data (hours: minutes) 
> in which the hours and minutes are separated by a decimal 
> point instead of a colon (so 6:45 AM is expressed as 6.45, 
> not 6.75). 
> 
> I have 2 variables: starttime and endtime. I need to 
> subtract start-times from the end-times, which I cannot due 
> with the present variable format.  I was thinking of using 
> the "hmm" function that is part of the -egenmore- package.  
> But I need to separate the hours and minutes and this is 
> where I get stuck.

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