methods.vif.rma: Methods for 'vif.rma' Objects

In wviechtb/metafor: Meta-Analysis Package for R

Methods for 'vif.rma' Objects

Description

Methods for objects of class "vif.rma".

Usage

## S3 method for class 'vif.rma'
as.data.frame(x, ...)

Arguments

x	an object of class "vif.rma".
...	other arguments.

Author(s)

Wolfgang Viechtbauer ([e-mail], https://www.metafor-project.org).

References

Viechtbauer, W. (2010). Conducting meta-analyses in R with the metafor package. Journal of Statistical Software, 36(3), 1–48. ⁠https://doi.org/10.18637/jss.v036.i03⁠

Examples

### copy data into 'dat'
dat <- dat.bcg

### calculate log risk ratios and corresponding sampling variances
dat <- escalc(measure="RR", ai=tpos, bi=tneg, ci=cpos, di=cneg, data=dat)

### fit mixed-effects meta-regression model
res <- rma(yi, vi, mods = ~ ablat + year + alloc, data=dat)

### get variance inflation factors for all individual coefficients
sav <- vif(res)
sav

### turn object into a regular data frame
as.data.frame(sav)

### get VIFs for ablat and year and the generalized VIF for alloc
sav <- vif(res, btt=list("ablat","alloc","year"))
sav

### turn object into a regular data frame
as.data.frame(sav)

wviechtb/metafor documentation built on Dec. 4, 2024, 1:03 a.m.