(STAT) [wolfgang.viechtba...@maastrichtuniversity.nl] Sent: 27
August 2014 17:30 To: Owen, Branwen; r-help@r-project.org Subject:
RE: [R] Metafor -can't calculate heterogeneity with non-positive
sampling variances The warning message pretty much says it: When one
of the variances is zero, then the I^
wen; r-help@r-project.org
Subject: RE: [R] Metafor -can't calculate heterogeneity with non-positive
sampling variances
The warning message pretty much says it: When one of the variances is zero,
then the I^2 statistic (and various other things) cannot be computed, at least
if one sticks to the u
^2, but to consider if vi=0 is really sensible.
Best,
Wolfgang
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf Of Owen, Branwen
> Sent: Wednesday, August 27, 2014 13:48
> To: r-help@r-project.org
> Subject: [R]
Hi, I'm doing a meta-analysis in metafor. All is fine except when there are 0s
in the values that i'm pooling, then i get a pooled estimate but not the I2
that i am also interested in.
for example:
summary(rma.1<-rma(yi,vi,data=mix,method="ML",knha=F,weighted=F,intercept=T))
(where yi are the st
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