R Graphical Manual

Browse All

Last data update: 2014.03.03

R: pFormula: An extended Formula interface for panel data

pFormula

R Documentation

pFormula: An extended Formula interface for panel data

Description

pFormula is a Formula object, with methods useful for panel data.

Usage

pFormula(object)
## S3 method for class 'pFormula'
as.Formula(x, ...)
## S3 method for class 'pFormula'
model.frame(formula, data, ...,
                                 lhs = NULL, rhs = NULL)
## S3 method for class 'pFormula'
model.matrix(object, data,
                                  model = c("pooling","within","Between",
  "between","mean","random","fd"), 
                                  effect = c("individual","time","twoways"),
                                  rhs = 1,
                                  theta = NULL, ...)

Arguments

`object, formula, x`	an object of class `"pFormula"`,
`data`	a `data.frame`,
`effect`	the effects introduced in the model, one of `"individual"`, `"time"` or `"twoways"`,
`model`	one of `"pooling"`, `"within"`, `"between"`, `"random",` `"fd"` and `"ht"`,
`theta`	the parameter for the transformation if `model = "random"`,
`lhs`	,
`rhs`	,
`...`	further arguments.

Details

The lhs and rhs arguments are inherited from Formula. The model.frame method returns a pdata.frame object. The model.matrix unables the transformation specified by the model and effect arguments.

Value

An object of class c("pFormula", "Formula".

Author(s)

Yves Croissant