my.dummy.df | R Documentation |
This function generates a dummy variable data frame in support various functions.
my.dummy.df(data, contr = "contr.niets")
data |
a data frame |
contr |
an optional list. See the contrasts.arg of model.matrix.default. |
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.
For datasets with categorical variables it produces the specified design matrix.
Nelson Lee Afanador (nelson.afanador@mvdalab.com)
data(iris) my.dummy.df(iris)
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