[R] Multiply each depth level of an array with another vector element

[Wu Gong]

I have only achieved a half improvement.

x <- array(1:24000000*1, dim = c(200,300,400))
y <- 1:400*1
ptm <- proc.time()
z <- x*as.vector(t(replicate(dim(x)[1]*dim(x)[2], y[1:dim(x)[3]]))) 
"replicate:"
proc.time() - ptm

x <- array(1:24000000*1, dim = c(200,300,400))
y <- 1:400*1
ptm <- proc.time()
z <- x*rep(y[1:dim(x)[3]],each=dim(x)[1]*dim(x)[2])
"rep:"
proc.time() - ptm

-----
A R learner.
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