as.bit {bit} | R Documentation |
Coercing to bit vector
as.bit(x, ...) ## S3 method for class 'bit' as.bit(x, ...) ## S3 method for class 'logical' as.bit(x, ...) ## S3 method for class 'integer' as.bit(x, ...) ## S3 method for class 'bitwhich' as.bit(x, ...) ## S3 method for class 'which' as.bit(x, length, ...) ## S3 method for class 'ri' as.bit(x, ...)
x |
an object of class |
length |
the length of the new bit vector |
... |
further arguments |
Coercing to bit is quite fast because we use a double loop that fixes each word in a processor register
is.bit
returns FALSE or TRUE, as.bit
returns a vector of class 'bit'
Zero is coerced to FALSE, all other numbers including NA are coerced to TRUE. This differs from the NA-to-FALSE coercion in package ff and may change in the future.
Jens Oehlschlägel
x <- as.bit(c(FALSE, NA, TRUE)) as.bit(x) as.bit.which(c(1,3,4), 12)