tensor model matrix
Computes the model matrix of tensor product smooth from the marginal bases.
tensor.prod.X(X)
X |
list of m design matrices with n rows and p1, p2, ... pm columns respectively |
T |
Matrix of dimensions n*(p1*p2*...*pm) representing the row tensor product of the matrices in X |
library(survPen) # row-wise tensor product between three design matrices set.seed(15) X1 <- matrix(rnorm(10*3),nrow=10,ncol=3) X2 <- matrix(rnorm(10*2),nrow=10,ncol=2) X3 <- matrix(rnorm(10*2),nrow=10,ncol=2) tensor.prod.X(list(X1,X2,X3))
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