Dear Damien
Comments in line
On 03/06/2019 15:50, Damien Zurkinden wrote:
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)
I do not use metaplus but it seems unlikely that you are going to get
useful results within the standard errors
NAMA.meta <- metaplus(yi= 2011 ~ 2019, slab = 1 ~ 113, data=NAMA)
You have supplied a formula for yi and for slab. In your text you said
you had supplied a vector of character strings.
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
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