Nothing
rbf <-
function(x, x.basis, sigma)
{
kern <- matrix(0, nrow=nrow(x), ncol=nrow(x.basis))
for (k in seq(nrow(x.basis))){
x.basis.test <- matrix(x.basis[k,], nrow=nrow(x),
ncol=ncol(x.basis), byrow=TRUE)
kern[,k] <- exp(-apply(((x-x.basis.test)^2)/(2*sigma^2), 1, sum))
}
kern
}
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