Re: [R] create a matrix with values from data.frame

[Nicolas Gutierrez]

Thanks Jim and David.. that was easy!

Nic

On 3/19/2011 3:00 PM, jim holtman wrote:

x.mat<- matrix(NA, 95, 55)  # create matrix

 x.mat[cbind(x$xloc, x$yloc)]<- x$totW
 which(!is.na(x.mat), arr.ind =TRUE)

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