Note that the difference between this and using -sign(y)-
is that -sign(0)- is 0.
A quite different point is that there is another way
to write what Jennifer is suggesting, namely
gen z = cond(y < 0, -x, x)
Nick
n.j.cox@durham.ac.uk
Marino, Jennifer
> Maybe I'm not understanding, but couldn't you just do this?
>
> gen z = x
> replace z = x*(-1) if y<0
Danielle H. Ferry
> Is it possible to get the sign of a value? I.e., I would like to
> multiply the var x by either -1 or +1 depending on the sign of var y.
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