https://github.com/cran/pracma
Tip revision: 03698027c2d84118bd0c53c4a9a5b5d23676f388 authored by HwB on 01 October 2012, 00:00:00 UTC
version 1.2.0
version 1.2.0
Tip revision: 0369802
nextpow2.Rd
\name{nextpow2}
\alias{nextpow2}
\title{Next Power of 2}
\description{
Smallest power of 2 greater than the argument.
}
\usage{
nextpow2(x)
}
\arguments{
\item{x}{numeric scalar, vector, or matrix}
}
\details{
Computes the smalest integer \code{n} such that \eqn{abs(x) \le 2^n}.
IF \code{x} is a vector or matrix, returns the result component-wise.
For negative or complex values, the absolute value will be taken.
}
\value{
an integer \code{n} such that \eqn{x \le 2^n}.
}
\author{
hwb \email{hwborchers@googlemail.com}
}
\seealso{
\code{\link{pow2}}
}
\examples{
nextpow2(10) #=> 4
nextpow2(1:10) #=> 0 1 2 2 3 3 3 3 4 4
nextpow2(-2^10) #=> 10
nextpow2(.Machine$double.eps) #=> -52
}
\keyword{ arith }