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RE: st: regression using generalized linear model
From
Joe Canner <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: regression using generalized linear model
Date
Tue, 11 Mar 2014 18:51:44 +0000
Actually, Aidan provides us with most of the answer in his post. He indicates that variable -a- is a "string character" and that -u- "contains non integer and negative values".
Nick has suggested a fix for string variables (-encode-). -destring- may also work. I don't remember enough about PROC GLM to know how u*u should be translated into Stata. If the asterisk is an interaction, perhaps a hash(#) would work better in Stata.
Incidentally, how did Aidan get the asterisks to work at all in Stata? Is that new in version 13?
Joe
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Tuesday, March 11, 2014 2:40 PM
To: [email protected]
Subject: Re: st: regression using generalized linear model
I've never used SAS but I have used Stata [NB].
But the message does explain the problem, which may be why no-one
answered this first time this was asked.
At least one of your variables -v y u t a b- contains something other
than integers. So,
. codebook v y u t a b
to see which variable(s) don't come up to scratch. Perhaps one is
string. Even if SAS permits string predictors (I don't know its
terminology), Stata expects you to -encode- string variables before
using them in -anova-.
(Please note our policy on repeating posts. It's best to wonder why a
post didn't get answered, and revise it, and not to seem too
impatient.)
Nick
[email protected]
On 11 March 2014 18:28, Aidan Trung Nguyen <[email protected]> wrote:
> I'm trying to write the STATA equivalent of the followingSAS statement:
>
> proc glm data=datasetclass a b model x = v*y*y u*u t a*b
> weight w
> output out = outputdataset
>
>
> a is a string character
> b, x, v, y, u, t are numeric
> u contains non integer and negative values
>
> I tried the below command but without success:anova x v*y*y u*u t a*b
>
> error message : factor variables may not contain non integervalues Any guidance is much appreciated.
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