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

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

Finn Lindgren finn.lindgren@gmail.com