resample_factor draws a random (sub)sample (with or without
replacement) of the groups or clusters identified by the fac argument.
resample_factor(data, param = list(fac = "class", n = Inf, replace = FALSE))a data.frame, rows represent samples
a list with the following components: fac is a factor variable
of length nrow(data) or the name of a factor variable in data; n is a
numeric value specifying the size of the subsample (in terms of groups, not
observations); replace determines if resampling of groups is to be done
with or without replacement.
a data.frame containing a subset of the rows of data.
If param$replace=FALSE, a subsample of
min(param$n,nlevel(data[,fac])) groups will be drawn from data. If
param$replace=TRUE, the number of groups to be drawn is param$n.