fm_row_kron {fmesher}

Row-wise Kronecker products

Description

Takes two Matrices and computes the row-wise Kronecker product. Optionally applies row-wise weights and/or applies an additional 0/1 row-wise Kronecker matrix product.

Usage

fm_row_kron(M1, M2, repl = NULL, n.repl = NULL, weights = NULL)

Arguments

M1

A matrix that can be transformed into a sparse Matrix.

M2

A matrix that can be transformed into a sparse Matrix.

repl

An optional index vector. For each entry, specifies which replicate the row belongs to, in the sense used in INLA::inla.spde.make.A

n.repl

The maximum replicate index, in the sense used in INLA::inla.spde.make.A().

weights

Optional scaling weights to be applied row-wise to the resulting matrix.

Value

A Matrix::sparseMatrix object.

Author(s)

Finn Lindgren [e-mail]

Examples

fm_row_kron(rbind(c(1, 1, 0), c(0, 1, 1)), rbind(c(1, 2), c(3, 4)))