model.matrix.rma: Extract the Model Matrix from 'rma' Objects

View source: R/model.matrix.rma.r

model.matrix.rmaR Documentation

Extract the Model Matrix from 'rma' Objects

Description

Function to extract the model matrix from objects of class "rma".

Usage

## S3 method for class 'rma'
model.matrix(object, asdf, ...)

Arguments

object

an object of class "rma".

asdf

logical to specify whether the model matrix should be turned into a data frame (the default is FALSE).

...

other arguments.

Value

The model matrix.

Author(s)

Wolfgang Viechtbauer wvb@metafor-project.org 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

See Also

rma.uni, rma.glmm, and rma.mv for functions to fit models for which a model matrix can be extracted.

fitted for a function to extract the fitted values.

Examples

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

### fit mixed-effects model with absolute latitude and publication year as moderators
res <- rma(yi, vi, mods = ~ ablat + year, data=dat)

### extract the model matrix
model.matrix(res)

wviechtb/metafor documentation built on March 11, 2024, 11:45 a.m.