as.bit.NULL: Coercing to bit

Description

Coercing to bit vector

Usage

# S3 method for `NULL`
as.bit(x, ...)
# S3 method for bit
as.bit(x, ...)
# S3 method for logical
as.bit(x, ...)
# S3 method for integer
as.bit(x, ...)
# S3 method for double
as.bit(x, ...)
# S3 method for bitwhich
as.bit(x, ...)
# S3 method for which
as.bit(x, length = attr(x, "maxindex"), ...)
# S3 method for ri
as.bit(x, ...)
as.bit(x = NULL, ...)

Value

is.bit returns FALSE or TRUE, as.bit returns a vector of class 'bit'

Arguments

x: an object of class bit(), logical(), integer(), bitwhich() or an integer from as.which() or a boolean ff
...: further arguments
length: the length of the new bit vector

Methods (by class)

as.bit(`NULL`): method to coerce to bit() (zero length) from NULL
as.bit(bit): method to coerce to bit() from bit()
as.bit(logical): method to coerce to bit() from logical()
as.bit(integer): method to coerce to bit() from integer() (0L and NA become FALSE, everthing else becomes TRUE)
as.bit(double): method to coerce to bit() from double() (0 and NA become FALSE, everthing else becomes TRUE)
as.bit(bitwhich): method to coerce to bit() from bitwhich()
as.bit(which): method to coerce to bit() from which()
as.bit(ri): method to coerce to bit() from ri()

Author

Jens Oehlschlägel

Details

Coercing to bit is quite fast because we use a double loop that fixes each word in a processor register

Examples

Run this code

as.bit(c(0L, 1L, 2L, -2L, NA))
as.bit(c(0, 1, 2, -2, NA))

as.bit(c(FALSE, NA, TRUE))

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