[R-meta] modifying the default forest plot

[Mukht Kaur]

Hi Wolfgang,
Here's how I fit the model:
random <-rma(yi=effsiz, sei=se, data=mv3)

When I try to get the labels for author and year instead of Study 1, Study
2, in my forest plot, the statement used and error is shown below:

forest(random, showweights=TRUE, xlab='Estimated Effect Size',
order="obs",slab=paste(random$author,random$year, sep=", "))
Error in forest.rma(random, showweights = TRUE, xlab = "Estimated Effect
Size",  :
  Number of outcomes does not correspond to the length of the 'slab'
argument.

Please let me know.

Thanks

On Tue, Dec 5, 2017 at 4:58 AM, Viechtbauer Wolfgang (SP) <
wolfgang.viechtbauer at maastrichtuniversity.nl> wrote:

> Ken already gave some pointers.
>
> 1) How could I get the author and year instead?
>
> Use the 'slab' argument. For example:
>
> slab=paste(dat$author, dat$year, sep=", "))
>
> (assuming that there are 'author' and 'year' variables in the data frame
> 'dat').
>
> 2) It would be better if I can get them arranged according to the observed
> effect size - is that possible?
>
> Use argument: order="obs"
>
> 3) Also, I would like to change the title of my X axis to 'Estimated
> Effect Size'
> rather than the default title 'Observed Outcome'.
>
> Use argument: xlab="Estimated Effect Size"
>
> 4) Lastly, would it be possible to specify the exact weight assigned to
> each study in the forest plot?
>
> Use argument: showweights=TRUE
>
> Best,
> Wolfgang
>
> -----Original Message-----
> From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-
> bounces at r-project.org] On Behalf Of Mukht Kaur
> Sent: Tuesday, 05 December, 2017 6:30
> To: r-sig-meta-analysis at r-project.org
> Subject: [R-meta] modifying the default forest plot
>
> Hi everyone!
>
> I am new to meta-analysis methodology and I am using R software to do my
> quantitative synthesis. I am using random effects model to analyse my
> individual studies through rma function in metafor package.
>
> By using 'forest(mymodelname)', I have a basic forest plot where my
> individual studies are shown as Study 1, Study 2, and so on. How could I
> get the author and year instead? It would be better if I can get them
> arranged according to the observed effect size - is that possible? Also, I
> would like to change the title of my X axis to 'Estimated Effect Size'
> rather than the default title 'Observed Outcome'. Lastly, would it be
> possible to specify the exact weight assigned to each study in the forest
> plot?
> Many thanks in advance for your help.
>
> MK
>

	[[alternative HTML version deleted]]