Wolfgang Viechtbauer, Ph.D., Statistician | Department of Psychiatry and
Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD
Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Marco
> Colagrossi
> Sent: Monday, August 24, 2015 16:04
> To: r-help at r-project.org
> Subject: [R] Metafor and forest(); not showing 'ilab' and text
>
> Hello folks,
>
> I have a couple of issues with the metafor package, specifically with
> the forest graphs.
> I am currently conducting a Meta-Analysis in economics throughout the
> metafor package.
>
> My meta-analysis has the specific of having different cases from
> single studies, and this proven to be challenging especially when
> trying to plot graphically the results I'm obtaining.
>
> Here's the code:
>
> forest(pc, var, ci95m, ci95p, slab = authoryear, psize=1,
> subset=(pub==1),
> ilab = cbind(ys, f_dim, SIMdv, SIMiv),
> ilab.xpos = c(-9.5, -8, -6, -4.5), cex = 0.75)
> par(font=2)
> text(c(-9.5,-8,-6,-4.5), 26, c("Years", "Firm(s) Dimension", "DV",
> "IV"))
> text(-16, 26, "Author(s) and Year", pos=4)
> text(6, 26, "Observed Outcome [95% CI]", pos=2)
> par(op)
>
> 'pc' is the 'effect size', 'var' the variance, 'ci95m & ci95p' the CI,
> 'pub' if the paper has been published or not. the pub subset was the
> first idea I had in order to split my sample that otherwise would have
> been to big. The issue with this solution is that forest() displays
> only the slap argument and the forest with the confidence interval,
> completely ignoring the lab argument and the text I'm trying to add.
> Moreover, the graph is showed correctly only within the zoom in
> Rstudio but if I save it it is showed as enclosed.
>
> What I'm doing wrong? I tried both to look at the package
> documentation and online but I can't figure it out.
>
> Moreover, how would you suggest to handle (graphically) the
> multiple-cases-per-study thing? It's a 'good' way to average the cases
> among different studies in the graphs?
> In my meta-analysis I'm using a multilevel model as shown in
> Gelman-Hill but graphically (and in tables) I'm struggling.
>
> Thanks for your help and patience
>
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