linop.Matrix

Contents

linop.Matrix#

class bartorch.linop.Matrix#

Bases: LinearOperator

Multiplication by a matrix along one axis, BART’s linop_matrix.

The matrix is an array like any other: it contracts the axis the domain and the codomain differ along and broadcasts over the axes it has only one of, so one operator can carry a different matrix per slice.

Parameters:

  • matrix (tensor) – The matrix, with the domain’s size along the axis it contracts and the codomain’s along the axis it produces.

  • oshape (tuple of int) – Codomain and domain, C order, with the same number of axes.

  • ishape (tuple of int) – Codomain and domain, C order, with the same number of axes.

Examples

A basis of k functions over t samples, applied along the first axis of (t, y, x):

>>> B = Matrix(basis, (k, y, x), (t, y, x))

Also has the methods and properties of LinearOperator.

Contents