OperatorVectorSum.derivative

OperatorVectorSum.derivative(point)

Derivative the operator vector sum.

It is equal to the derivative of the "inner" operator:

OperatorVectorSum(op, y).derivative(z) == op.derivative(z)

Parameters:

pointdomain element

Any element in the domain where the derivative should be taken

Examples

>>> r3 = odl.rn(3)
>>> op = odl.IdentityOperator(r3)
>>> sum = odl.OperatorVectorSum(op, r3.element([1, 2, 3]))
>>> x = r3.element([4, 5, 6])
>>> sum.derivative(x)(x)
rn(3).element([ 4.,  5.,  6.])