matvec-methods {DelayedTensor}

R Documentation

Tensor Matvec Unfolding of DelayedArray

Description

For 3-tensors only. Stacks the slices along the third mode.

Usage

matvec(darr)

## S4 method for signature 'DelayedArray'
matvec(darr)

Arguments

darr	DelayedArray object

Details

This function is an extension of the matvec by DelayedArray.

This is a wrapper function to unfold.

Value

matrix with prod(dim(darr)[-m]) rows and dim(darr)[m] columns

References

M. Kilmer, K. Braman, N. Hao, and R. Hoover, "Third-order tensors as operators on matrices: a theoretical and computational framework with applications in imaging". SIAM Journal on Matrix Analysis and Applications 2013.

See Also

unfold, unmatvec

Examples

library("DelayedRandomArray")
darr <- RandomUnifArray(c(2,3,4))
matvec(darr)

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