PowerOperator.derivative

PowerOperator.derivative(point)

Derivative of this operator.

PowerOperator(p).derivative(y)(x) == p * y ** (p - 1) * x

Parameters:

pointdomain element

The point in which to take the derivative

Returns:

derivativeOperator

The derivative in point

Examples

Use on vector spaces:

>>> op = PowerOperator(odl.rn(3), exponent=2)
>>> dop = op.derivative(op.domain.element([1, 2, 3]))
>>> dop([1, 1, 1])
rn(3).element([ 2.,  4.,  6.])

Use with scalars:

>>> op = PowerOperator(odl.RealNumbers(), exponent=2)
>>> dop = op.derivative(2.0)
>>> dop(2.0)
8.0