categorize: categorize

In cyclopenta/mylinear: Linear Regression for BIOSTAT625 based on BIOSTAT650

Description

categorize a set of variables automatically into dummy variables. Return data frame with categorized values. The method could only be reference coding or cell means coding.Score coding is not integrated in this function. The main usage for this function is usesd internally in mylm function. But user could also use this to create categorical variables as well.

Usage

categorize(data, vars, method = c("reference", "cellmeans"), ref = c())

Arguments

data	input data frame with no NAs, should include all the covariates that will be used later
vars	name vector for the category variables
method	specify the method for categorization
ref	specify the reference level for each categorical variable

Value

data frame with all the category variables transformed to numerous dummy variables.

Examples

data(mydata)
categorize(mydata, c('R_E', 'NIHSS_4Cat'), ref = c(0,1))
categorize(mydata, c('R_E', 'NIHSS_4Cat'), method = 'cellmeans')

cyclopenta/mylinear documentation built on Dec. 19, 2021, 7:07 p.m.