ConstantOperator

class odl.operator.default_ops.ConstantOperator(*args, **kwargs)

Bases: Operator

Operator that always returns the same value.

Implements:

ConstantOperator(y)(x) == y

Attributes:

adjoint

Adjoint of the operator.

constant

Constant space element returned by this operator.

domain

Set of objects on which this operator can be evaluated.

inverse

Return the operator inverse.

is_functional

True if this operator's range is a Field.

is_linear

True if this operator is linear.

range

Set in which the result of an evaluation of this operator lies.

Methods

__call__(x[, out])	Return self(x[, out, **kwargs]).
derivative(point)	Derivative of this operator, always zero.
norm([estimate])	Return the operator norm of this operator.

__init__(constant, domain=None, range=None)

Initialize a new instance.

Parameters:

constantLinearSpaceElement or range element-like

The constant space element to be returned. If range is not provided, constant must be a LinearSpaceElement since the operator range is then inferred from it.

domainLinearSpace, optional

Domain of the operator. Default: vector.space

rangeLinearSpace, optional

Range of the operator. Default: vector.space

Examples

>>> r3 = odl.rn(3)
>>> x = r3.element([1, 2, 3])
>>> op = ConstantOperator(x)
>>> op(x, out=r3.element())
rn(3).element([ 1.,  2.,  3.])