data(mgrid5d15)
dim(mgrid5d15$x1)
dim(mgrid5d15$x2)
dim(mgrid5d15$x3)
dim(mgrid5d15$x4)
dim(mgrid5d15$x5)
data(mgrid5d30)
dim(mgrid5d30$x1)
dim(mgrid5d30$x2)
dim(mgrid5d30$x3)
dim(mgrid5d30$x4)
dim(mgrid5d30$x5)
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