dim(X) <- c(prod(dim(X)[1:3]), dim(X)[4])

?

On Feb 28, 2008, at 3:05 PM, Gang Chen wrote:

Suppose I have a 4-D array X with dimensions (dx, dy, dz, dp). I want
to collapse the first 3 dimensions of X to make a 2-D array Y with
dimensions (dx*dy*dz, dp). Instead of awkward looping, what is a good
way to do this? Is there a similar function like reshape in Matlab?

Thanks,
Gang

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