dummy: Create Dummy Variables

In uwIntroStats: Descriptive Statistics, Inference, Regression, and Plotting in an Introductory Statistics Course

Description

Creates dummy variables.

Usage

  dummy(x,subset=rep(T,length(x)),
        reference=sort(unique(x[!is.na(x)])),includeAll=F, version=F)

Arguments

x	variable used to create the dummy variables.
subset	a subset of the data, if desired.
reference	the reference value for the dummy variables to compare to.
includeAll	logical value indicating whether all of the dummy variables should be returned (including the reference).
version	if TRUE, returns the version of the function and nothing else.

Value

A matrix containing the dummy variables.

Author(s)

Scott S. Emerson, M.D., Ph.D., Andrew J. Spieker, Brian D. Williamson

Examples

  # Reading in a dataset
  mri <- read.table("http://www.emersonstatistics.com/datasets/mri.txt", header=TRUE)
  attach(mri)
  # Create a dummy variable for race
  dummy(race)

uwIntroStats documentation built on May 2, 2019, 4:34 a.m.