lbfgsb.rosenbrock_grad

lbfgsb.rosenbrock_grad(x: ndarray[tuple[Any, ...], dtype[float64]]) → ndarray[tuple[Any, ...], dtype[float64]]

The gradient of the Rosenbrock function.

Parameters:

x (array_like) – Array of of points at which the Rosenbrock function is to be computed. It can be of shape (m,) or (m, n), m being the number of variables per vector of parameters and n the number of different vectors.

Returns:

The gradient(s) of the Rosenbrock function with the same shapes as the input x.

Return type:

NDArrayFloat