[R-meta] Setting non-log x axis and tick marks organized when "atransf = exp" is used in the forest plot

Dear Win,

I am not entirely sure I understand exactly what you want, but I think you
want to use the 'transf' argument instead of 'atransf'. For example:

library(metafor)

dat <- dat.bcg
dat <- escalc(measure="RR", ai=tpos, bi=tneg, ci=cpos, di=cneg, data=dat,
              slab=paste0(author, ", ", year))
res <- rma(yi, vi, data=dat)

# forest plot of the log risk ratios
forest(res, header=TRUE)

# forest plot of the risk ratios (log scale for the x-axis)
forest(res, header=TRUE, atransf=exp, at=log(c(0.05, 0.25, 1, 4)))

# forest plot of the risk ratios
forest(res, header=TRUE, transf=exp, alim=c(0,4), refline=1)

In the last case, the CIs will be asymmetric since exp() is a non-linear
transformation.

Best,
Wolfgang

-----Original Message-----
From: R-sig-meta-analysis [mailto:

r-sig-meta-analysis-bounces at r-project.org] On

Behalf Of Win Thu via R-sig-meta-analysis
Sent: Friday, 02 June, 2023 13:52
To: r-sig-meta-analysis at r-project.org
Cc: Win Thu
Subject: [R-meta] Setting non-log x axis and tick marks organized when

"atransf =

exp" is used in the forest plot

Hello,

Currently, I finished a meta-analysis using metafor. Please advise how I

can keep

the X axis scale organized in the forest plot without needing to change

it into a

log scale when "atransf = exp" is used in the forest function.

I used "atransf = exp" as I want to show the risk estimates and the

result on a

normal scale in the forest plot.
The code is: forest (meta, atransf = exp) which gave me a X axis and tick

marks

not organized well and sometimes bizarre (fig below).

I need to use: forest (meta, atransf = exp, at = log (c(0.5,1,1.5)) to

get a more

organized x axis (fig below) but the X axis scale is now in log scale

while

the result is not in log scale. The journal I want to publish asks to

keep the X

axis scale same with the relative risk scale. I want to keep relative

risk on a

normal scale, and thus, the X axis should not be in log scale.

Your help will be greatly appreciated as I was trying several days and

hours

without success.

Thank you very much in advance,
Win