nifty8.operators.operator_adapter module

class OperatorAdapter(op, op_transform, domain_dtype=<class 'float'>)

Bases: LinearOperator

Class representing the inverse and/or adjoint of another operator.

Objects of this class are created internally by LinearOperator whenever the inverse and/or adjoint of an already existing operator object is requested via the LinearOperator attributes inverse, adjoint or _flip_modes().

Users should never have to create instances of this class directly.

Parameters:

• op (LinearOperator) – The operator on which the adapter will act

• op_transform (int) –

  1. adjoint

  2. inverse

  3. adjoint inverse

__init__(op, op_transform, domain_dtype=<class 'float'>)

__repr__()

Return repr(self).

apply(x, mode)

Applies the Operator to a given x, in a specified mode.

Parameters:

• x (nifty8.field.Field) – The input Field, defined on the Operator’s domain or target, depending on mode.

• mode (int) –

  • TIMES: normal application

  • ADJOINT_TIMES: adjoint application

  • INVERSE_TIMES: inverse application

  • ADJOINT_INVERSE_TIMES or INVERSE_ADJOINT_TIMES: adjoint inverse application

Returns:

The processed Field defined on the Operator’s target or domain, depending on mode.

Return type:

nifty8.field.Field

draw_sample(from_inverse=False)