Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: regression using generalized linear model
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: regression using generalized linear model
Date
Tue, 11 Mar 2014 19:02:48 +0000
Well spotted, but in turn Aidan said that syntax didn't work in Stata.
Nick
[email protected]
On 11 March 2014 18:51, Joe Canner <[email protected]> wrote:
> 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.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/