my.dummy.df {mvdalab} | R Documentation |
Create a Design Matrix with the Desired Constrasts
Description
This function generates a dummy variable data frame in support various functions.
Usage
my.dummy.df(data, contr = "contr.niets")
Arguments
data |
a data frame |
contr |
an optional list. See the contrasts.arg of model.matrix.default. |
Details
my.dummy.df takes a data.frame
with categorical variables, and returns a data.frame
in which all the categorical variables columns are expanded as dummy variables.
The argument contr
is passed to the default contr.niets
; contr.helmert
, contr.poly
, contr.sum
, contr.treatment
are also supported.
Value
For datasets with categorical variables it produces the specified design matrix.
Author(s)
Nelson Lee Afanador (nelson.afanador@mvdalab.com)
Examples
data(iris)
my.dummy.df(iris)
[Package mvdalab version 1.7 Index]