Hey,

I want to build a forest plot which states author and year for a subset of
studies.

But if I use this argument:

resultREML <- rma(yi=yi, vi=vi, method = "REML",
                     data = subset(empa, task=="x"))
resultREML

forest(resultREML, , slab=paste(empa$author, empa$year,sep = ","))

I get the following error message:

Error in forest.rma(resultREML, slab = paste(EFempa$Autor,
EFempa$Jahreszahl,  :
  Number of outcomes does not correspond to the length of the slab argument.


When I use this method without the subset function it works and I get a
forest plot stating author and year - but of course for the whole data set,
not only for the subset "x" that I want.

Any idea how I can make the subset function work for a forest plot with
slab function ?

Thanks in advance!

Verena

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