nlme (version 3.1-1)

model.matrix.reStruct: reStruct Model Matrix

Description

The model matrices for each element of formula(object), calculated using data, are bound together column-wise. When multiple grouping levels are present (i.e. when length(object) > 1), the individual model matrices are combined from innermost (at the leftmost position) to outermost (at the rightmost position).

Usage

model.matrix(object, data, contr)

Arguments

object
an object inheriting from class reStruct, representing a random effects structure and consisting of a list of pdMat objects.
data
a data frame in which to evaluate the variables defined in formula(object).
contr
an optional named list specifying the contrasts to be used for representing the factor variables in data. The components names should match the names of the variables in data for which the contrasts are to b

Value

  • a matrix obtained by binding together, column-wise, the model matrices for each element of formula(object).

See Also

model.matrix, contrasts, reStruct, formula.reStruct

Examples

Run this code
data(Pixel)
rs1 <- reStruct(list(Dog = ~day, Side = ~1), data = Pixel)
model.matrix(rs1, Pixel)

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