genDummy: Create dummy variables from a factor or integer variable

In simstudy: Simulation of Study Data

Create dummy variables from a factor or integer variable

Description

Create dummy variables from a factor or integer variable

Usage

genDummy(dtName, varname, sep = ".", replace = FALSE)

Arguments

dtName	Data table with column
varname	Name of factor
sep	Character to be used in creating new name for dummy fields. Valid characters include all letters and "_". Will default to ".". If an invalid character is provided, it will be replaced by default.
replace	If replace is set to TRUE (defaults to FALSE) the field referenced varname will be removed.

Examples

# First example:

def <- defData(varname = "cat", formula = ".2;.3;.5", dist = "categorical")
def <- defData(def, varname = "x", formula = 5, variance = 2)

dx <- genData(200, def)
dx

dx <- genFactor(dx, "cat", labels = c("one", "two", "three"), replace = TRUE)
dx <- genDummy(dx, varname = "fcat", sep = "_")

dx

# Second example:

dx <- genData(15)
dx <- trtAssign(dtName = dx, 3, grpName = "arm")
dx <- genDummy(dx, varname = "arm")
dx

simstudy documentation built on Nov. 23, 2023, 1:06 a.m.