View source: R/bruceR-stats_4_regress.R
group_mean_center | R Documentation |
Compute group-mean centered variables. Usually used for HLM level-1 predictors.
group_mean_center( data, vars = setdiff(names(data), by), by, std = FALSE, add.suffix = "", add.group.mean = "_mean" )
data |
Data object. |
vars |
Variable(s) to be centered. |
by |
Grouping variable. |
std |
Standardized or not. Default is |
add.suffix |
The suffix of the centered variable(s).
Default is |
add.group.mean |
The suffix of the variable name(s) of group means.
Default is |
A new data object containing the centered variable(s).
grand_mean_center
d = data.table(x=1:9, g=rep(1:3, each=3)) d.c = group_mean_center(d, "x", by="g") d.c d.c = group_mean_center(d, "x", by="g", add.suffix="_c") d.c
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