Dear Hugh
1 - Your post is unreadable because you posted in HTML so it will be
very difficult for anyone to see your V
2 - there is a separate mailing list for meta-analysis in R where you
may get more helpful responses as it is monitored by authors of most of
the main packages. Please see
This may be a very simple fix, but I am struggling to reproduce Becker's (1988)
imputation of control group effect sizes for single group trials. For some
reason that I cannot figure out, I am getting an "All list elements in 'V' must
be square matrices". Below is my V matrix, which I believe
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