f <- function(x) 1 - 1 / 2 * (sin(12 * x) / (1 + x) + 2 * cos(7 * x) * x^5 + 0.7)
set.seed(123)
X <- as.matrix(runif(10))
y <- f(X) + X/10 * rnorm(nrow(X)) # add noise dep. on X
k <- NoiseKriging(y, noise=(X/10)^2, X, kernel = "matern3_2")
print(k)
## same thing
k
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