Add powell(), powell1() and their tests.

[octave.git] / tests / wood_gradient_tests.m

## The gradient should be zero at the optimal point.

g = wood_gradient(1,1,1,1);
unit_test_equals("wood_gradient(1,1,1,1) == 0", ...
                 0, ...
                 wood_gradient(1,1,1,1));