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16 cat2bin
See Also
fixreg
Examples
can(429,3)
cat2bin
Recode nominal variables to binary variables
Description
Usage
Recodes a dataset with nominal variables so that the nominal variables are replaced by binary variables
for the categories.
Arguments
cat2bin(x,categorical=NULL)
x
categorical
data matrix or data frame. The data need to be organised case-wise, i.e., if
there are categorical variables only, and 15 cases with values c(1,1,2) on the 3
variables, the data matrix needs 15 rows with values 1 1 2. (Categorical variables
could take numbers or strings or anything that can be coerced to factor levels as
values.)
vector of numbers of variables to be recoded.
Value
A list with components
data
variableinfo
data matrix with variables specified in categorical replaced by 0-1 variables,
one for each category.
list of lists. One list for every variable in the original dataset, with four components
each, namely type ("categorical" or "not recoded"), levels (levels
of nominal recoded variables in order of binary variable in output dataset), ncat
(number of categories for recoded variables), varnum (number of variables in
output dataset belonging to this original variable).
Author(s)
Christian Hennig http://www.homepages.ucl.ac.uk/~ucakche
See Also
discrete.recode