[R-meta] weights in forest plot

[Antonia Sudkaemper]

Thank you very much, Wolfgang - this worked very well! (Previously I had
not specified the standard error, hence it didn't work...)

I have to follow-up questions, however.

1) How can I add a summary polygon to this plot indicating the Mean
Weighted Effect Size at the bottom of the plot, as is done automatically
when using the forest.rma function?

2) (How) Can I adjust the space between the rows? I am asking as I am
producing two different plots for the same study and I would like them to
look similar. One of the plots includes a lot more studies than the other
one though, and hence the space between the rows varies. Can I change this
so that the plots look similar?

Again, thank you so much for your help! All the best, Antonia



On Wed, 22 Aug 2018 at 12:00, Viechtbauer, Wolfgang (SP) <
wolfgang.viechtbauer using maastrichtuniversity.nl> wrote:

> Hi Antonia,
>
> This works just fine for me:
>
> yi <- c(.23, .55, .33)
> sei <- rep(.1, 3)
> ci.lb <- yi - 1.96*sei
> ci.ub <- yi + 1.96*sei
> forest(yi, ci.lb=ci.lb, ci.ub=ci.ub, showweights=TRUE, alim=c(0,1),
> refline=NA)
>
> Best,
> Wolfgang
>
> -----Original Message-----
> From: R-sig-meta-analysis [mailto:
> r-sig-meta-analysis-bounces using r-project.org] On Behalf Of Antonia Sudkaemper
> Sent: Wednesday, 22 August, 2018 12:05
> To: r-sig-meta-analysis using r-project.org
> Subject: [R-meta] weights in forest plot
>
> Hello metafor users,
>
> I am currently making a forest plot for a meta-analysis, I am using
> forest.default and am using vectors with the effect size, low CI, high CI
> as input.
>
>  I have been wondering whether there is a possibility to also display the
> weights used for each study? A colleague suggested to do this via the
> little squares that display the effect sizes, but I am not sure how that
> would work - any ideas?
>
> I found the "showweights" function, but when I set it to TRUE all values
> displayed are "0"- how can I enter a vector with the different weights per
> study?
>
> Thank you very much for your help.
>
> All the best, Antonia
>
> --
> Antonia Sudkämper
> PhD Candidate in Organizational Psychology/University of Exeter
> www.antoniasudkaemper.com
> a.sudkaemper using gmail.com
>


-- 
Antonia Sudkämper
PhD Candidate in Organizational Psychology/University of Exeter
www.antoniasudkaemper.com
a.sudkaemper using gmail.com

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