model.frame.dfidx: model.frame/matrix for dfidx objects

In dfidx: Indexed Data Frames

model.frame/matrix for dfidx objects

Description

Specific model.frame/matrix are provided for dfidx objects. This leads to an unusual order of arguments compared to the usage. Actually, the first two arguments of the model.frame method are a dfidx and a formula and the only main argument of the model.matrix is a dfidx which should be the result of a call to the model.frame method, i.e. it should have a term attribute.

Usage

## S3 method for class 'dfidx'
model.frame(
  formula,
  data = NULL,
  ...,
  lhs = NULL,
  rhs = NULL,
  dot = "previous",
  alt.subset = NULL,
  reflevel = NULL,
  balanced = FALSE
)

## S3 method for class 'dfidx'
model.matrix(object, ..., lhs = NULL, rhs = 1, dot = "separate")

## S3 method for class 'dfidx_matrix'
print(x, ..., n = 10L)

Arguments

formula	a dfidx
data	a formula
..., lhs, rhs, dot	see the Formula method
alt.subset	a subset of levels for the second index
reflevel	a user-defined first level for the second index
balanced	a boolean indicating if the resulting data.frame has to be balanced or not
object	a dfidx object
x	a model matrix
n	the number of lines to print

Value

a dfidx object for the model.frame method and a matrix for the model.matrix method.

Author(s)

Yves Croissant

Examples

mn <- dfidx(munnell)
mf <- model.frame(mn, gsp ~ privatecap | publiccap + utilities | unemp + labor)
model.matrix(mf, rhs = 1)
model.matrix(mf, rhs = 2)
model.matrix(mf, rhs = 1:3)

dfidx documentation built on Sept. 11, 2024, 7:55 p.m.