scipy.optimize.
rosen_hess#
- scipy.optimize.rosen_hess(x)[source]#
The Hessian matrix of the Rosenbrock function.
- Parameters:
- xarray_like
1-D array of points at which the Hessian matrix is to be computed.
- Returns:
- rosen_hessndarray
The Hessian matrix of the Rosenbrock function at x.
See also
Notes
rosen_hess
has experimental support for Python Array API Standard compatible backends in addition to NumPy. Please consider testing these features by setting an environment variableSCIPY_ARRAY_API=1
and providing CuPy, PyTorch, JAX, or Dask arrays as array arguments. The following combinations of backend and device (or other capability) are supported.Library
CPU
GPU
NumPy
✓
n/a
CuPy
n/a
✓
PyTorch
✓
✓
JAX
✗
✗
Dask
✓
✓
See Support for the array API standard for more information.
Examples
>>> import numpy as np >>> from scipy.optimize import rosen_hess >>> X = 0.1 * np.arange(4) >>> rosen_hess(X) array([[-38., 0., 0., 0.], [ 0., 134., -40., 0.], [ 0., -40., 130., -80.], [ 0., 0., -80., 200.]])