I have results of different surveys (years) for different species that I called
NAMA. I want to combining the results of those different surveys to produce one
overall result by using meta-analysis
I tried to implement my data using the R package metaplus. I used as Vector of
observed effect sizes corresponding to each study (yi) the years (colomns). I
used as Vector of character strings corresponding to each study (slab) the
species (lines).
note: I don't have Vector of observed standard errors corresponding to each
study (sei)
NAMA.meta <- metaplus(yi= 2011 ~ 2019, slab = 1 ~ 113, data=NAMA)
The expected results should be the parameter estimates & forest plot. However,
I receive an error message:
Error in terms.formula(object, data = data) :
terme incorrect dans une formule de mod�le
In addition: Warning message:
In metaplus(yi = 2011 ~ 2019, slab = 1 ~ 113, data = NAMA) :
Very few studies. Solution may be unstable.
Thanks for your help,
Damien
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
