Generates Class Indicator Matrix from a Factor
Generates a class indicator function from a given factor.
class.ind(cl)
cl |
factor or vector of classes for cases. |
a matrix which is zero except for the column corresponding to the class.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
# The function is currently defined as
class.ind <- function(cl)
{
n <- length(cl)
cl <- as.factor(cl)
x <- matrix(0, n, length(levels(cl)) )
x[(1:n) + n*(unclass(cl)-1)] <- 1
dimnames(x) <- list(names(cl), levels(cl))
x
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.