[R] Change array size

[Peter Dalgaard BSA]

"Liaw, Andy" <andy_liaw at merck.com> writes:

> Is the following what you want?
> 
> > x<- rnorm(800)
> > xt <- x[1:2^trunc(log(length(x),base=2))]
> > length(xt)
> [1] 512

I don't think so (notice "upper"). More likely

x <- rnorm(800)
l <- length(x)
xt <- c(x,numeric(2^ceiling(log(l,base=2))-l))
length(xt) # 1024

but "fits" might also imply interpolation?

> > Hi,
> > I would like to know if there is a way to change a vector of 
> > arbitrary size
> > to make it fits the nearest upper size multiple of a power of 2.


-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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