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st: Changing positive values to negative in Stata


From   Suzy <[email protected]>
To   [email protected]
Subject   st: Changing positive values to negative in Stata
Date   Thu, 20 Apr 2006 16:06:05 -0400

I have a continuous variable with positive, negative, and zero values and also missing values(.). I would like to know if anyone has an easy Stata code/command to change just the positive values to a negative (change the sign: 4.4567 to -4.4567) for just a particular subgroup of the total (n=661 out of over N=4,000). Within this subgroup (which I can sort, but not by id) there already are a few appropriately negative values in place.

Thank you,
Suzy

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