`scipy.optimize._lsq.common:step_size_to_bound`

Signature

def step_size_to_bound(x, s, lb, ub)

Compute a min_step size required to reach a bound.

The function computes a positive scalar t, such that x + s * t is on the bound.

step : float

Computed step. Non-negative value.

hits : ndarray of int with shape of x

Each element indicates whether a corresponding variable reaches the bound:

0 - the bound was not hit.
-1 - the lower bound was hit.
1 - the upper bound was hit.