Construct a logical vector with TRUE in specified positions.

This function is basically an inverse of which.

Usage

unwhich(which, n)

Arguments

which

a numeric vector of indices to set to TRUE.

n

total length of the output vector.

Value

A logical vector of length n whose elements listed in which are set to TRUE, and whose other elements are set to FALSE.

Examples

x <- as.logical(rbinom(10,1,0.5))
stopifnot(all(x == unwhich(which(x), 10)))