Convert a matrix or sparse matrix into the sparse formate used by INLA

Convert a matrix or sparse matrix into the sparse format used by INLA (dgTMatrix)

inla.as.sparse(A, unique = TRUE, na.rm = FALSE, zeros.rm = FALSE)

inla.as.dgTMatrix(...)

Arguments

A: The matrix
unique: Logical. If TRUE, then ensure that the internal representation is unique and there are no duplicated entries. (Do not change this unless you know what you are doing.)
na.rm: Replace NA's in the matrix with zeros.
zeros.rm: Remove zeros in the matrix.
...: The arguments. The matrix or sparse matrix, and the additonal arguments

inla.as.sparse and inla.as.dgTMatrix is the same function. The returned value is a sparse matrix in the dgTMatrix-format.


 A = matrix(1:9, 3, 3)
 inla.as.sparse(A)
#> 3 x 3 sparse Matrix of class "dgTMatrix"
#>           
#> [1,] 1 4 7
#> [2,] 2 5 8
#> [3,] 3 6 9