vectorization help please
im2[i,j] <- im[i,j] * (-1)^(row(im)+col(im))
Bill Simpson wrote:
What is a smarter way of doing:
for(i in 1:xn)
for(j in 1:yn)
{
im2[i,j]<- im[i,j]* (-1)^(i+j)
}
Thanks!
Bill
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Alberto G. Murta
IPIMAR - Institute of Fisheries and Sea Research
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