[R-meta] Error Stopped because k = 0 after sub setting​.

[Dr. Gerta Rücker]

Dear Klaow,


You now that R is case-sensitive? That is, see the following:


# Set

interven <- "pzq"

# Then

interven=="pzq" # provides
[1] TRUE

# However,

interven=="PZQ" # provides
[1] FALSE


That is, you have to spell the values in the code exactly as spelled in 
the data set.


Best,

Gerta



Am 17.09.2022 um 17:06 schrieb Klaow sota:
> I apologize for the messy data from the previous email.
> The screenshot photo might be better, I attached.
> I curious that yi/vi probably get problem and made the error happened.
> Best,
> Klaow
>
>
>
> ------------------------------------------------------------------------
> *From:* Michael Dewey <lists using dewey.myzen.co.uk>
> *Sent:* Saturday, September 17, 2022 7:26 PM
> *To:* Klaow sota <jija_99 using hotmail.com>; 
> r-sig-meta-analysis using r-project.org <r-sig-meta-analysis using r-project.org>
> *Subject:* Re: [R-meta] Error Stopped because k = 0 after sub setting​.
> Dear Klaow
>
> Without your data it is hard to be sure. I assume you have checked that
> the variable interven does indeed contain some values "PZQ"?
>
> Michael
>
> On 17/09/2022 11:44, Klaow sota wrote:
> > I have some problems with analysis in subgroup
> > It showed this message:
> >   > # fit random-effects model in the three subgroups
> >> res.s <- rma(yi, vi, subset=(interven=="PZQ"),data=dat)
> > Error: Stopped because k = 0 after sub setting​.
> >
> > How should I fix it?
> > Is it caused from vi, yi?
> >
> > Best regards,
> > Klaow
> >
> >        [[alternative HTML version deleted]]
> >
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> >
> >
>
> -- 
> Michael
> http://www.dewey.myzen.co.uk/home.html 
> <http://www.dewey.myzen.co.uk/home.html>
>
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-- 

Dr. rer. nat. Gerta Rücker, Dipl.-Math.

Guest Scientist
Institute of Medical Biometry and Statistics,
Faculty of Medicine and Medical Center - University of Freiburg

Zinkmattenstr. 6a, D-79108 Freiburg, Germany

Mail:     ruecker using imbi.uni-freiburg.de
Homepage: https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker


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