At 12:39 07/06/2013, Bernd Weiß wrote:
Am 07.06.2013 13:17, schrieb Michael Dewey:
At 19:34 06/06/2013, Bernd Weiss wrote:
Dear all,
I am struggling to add a prediction interval to a forest plot that was
created with forest.meta(), package "meta".
I checked the source of forest.meta() and realized that it is heavily
relying on grid. I am lacking any experience with grid graphics. So, I
am having difficulties to find out where the random effects estimate is
actually plotted in order to add prediction intervals.
I appreciate this is not a direct answer to your question but the
equivalent function in metafor (available from CRAN) does this and it
might be easier to use that.
Thanks, Michael!
Yes, I vaguely remember that the metafor package
can calculate the PIs but most of our analyses
rely on the meta package. On the other hand,
this might be a good reason to finally switch to metafor.
You probably refer to the function addpoly()
which can be used for that. I will check it out.
I was thinking of the addcred parameter to
forest.rma.uni in fact, although you could roll your own.
Again, thanks for your help,
Bernd
Michael Dewey
i...@aghmed.fsnet.co.uk
http://www.aghmed.fsnet.co.uk/home.html
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