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nlme (version 3.1-1)
MEdims: Calculate dimensions in mixed-effects
Description
Calculate the dimensions of various arrays used to represent a mixed-effects model.
Usage
MEdims(groups, ncols)
Arguments
groups
a factor or list of factors describing the grouping of the observations
ncols
a vector of positive integers listing the number of columns in the model matrices at each level of random effects terms or fixed effects