`scipy.optimize._dcsrch:DCSRCH.call`

source: build-install/usr/lib/python3.14/site-packages/scipy/optimize/_dcsrch.py:201

Signature

def __call__(self, alpha1, phi0 = None, derphi0 = None, maxiter = 100)

Parameters

alpha1 : float: alpha1 is the current estimate of a satisfactory step. A positive initial estimate must be provided.
phi0 : float: the value of phi at 0 (if known).
derphi0 : float: the derivative of derphi at 0 (if known).
maxiter : int

Returns

alpha : float

Step size, or None if no suitable step was found.

phi : float

Value of phi at the new point alpha.

phi0 : float

Value of phi at alpha=0.

task : bytes

On exit task indicates status information.

If task[:4] == b'CONV' then the search is successful.

If task[:4] == b'WARN' then the subroutine is not able to satisfy the convergence conditions. The exit value of stp contains the best point found during the search.

If task[:5] == b'ERROR' then there is an error in the input arguments.

Aliases

scipy.optimize._dcsrch.DCSRCH.__call__