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Re: st: RE: predict with if and option
It looks like you are trying to run the -predict- statement inside
some kind of double loop. I don't know the innards of -predict-, but
I'd guess it is trying to create the same variable for every value of
the loop arguments. If you had done "generate temp =foobar" inside a
loop, this would generate an error that the 'variable already
exists'; perhaps your error is the same. If the loop did the
prediction for the first time through on both arguments, that's the
problem. There are many possible solutions, including naming the new
variable by appending "i" and "t".
Maybe: "predict temp`i'`t' if ..."
Statalist FAQ state that you should show all the commands and all the
output that Stata generated. As Nick states, you haven't listed
enough for us to really know what went wrong.
-Steven
[email protected]
On Feb 11, 2008, at 4:35 PM, Nick Cox wrote:
This worked for me.
sysuse auto
regress mpg weight
predict foobar if rep78 < 3, stdp
I guess that you are doing something different that you are not
telling us, e.g. using a command other than -regress-.
Nick
[email protected]
William Bishop
I would like to run predict with the IF condition after a regression,
using the stdp option at the same time but am getting the error
"option stdp not allowed"
predict temp if id=="`i'"&n==`t', stdp
seems pretty basic. what am I missing? maybe I misunderstood the
documentation on predict, but I thought this was doable.
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