R: Builds a model matrix

model.matrix.formula {AlgDesign} | R Documentation

## Builds a model matrix

### Description

Produces a model matrix using expand.formula()

### Usage

    ## S3 method for class 'formula'
    model.matrix(frml,data,...)

### Arguments

`frml` | A formula.
`data` | A data.frame
`...` | Additional arguments passed to model.matrix.default()

### Details

This is a method function signaled by a formula as the first argument. It causes the formula to be translated by expand.formula() before calling model.matrix.default().

### Value

A matix.

### Author(s)

Bob Wheeler bwheelerg@gmail.com

Please cite this program as follows:

Wheeler, R.E. (2004). model.matrix.formula. AlgDesign. The R project for statistical computing http://www.r-project.org/

[Package AlgDesign version 1.1-7.3 Index]