XSLP_DELTA_R

Relative perturbation of values for calculating numerical derivatives

Double

0.001

First-order derivatives are calculated by perturbing the value of each variable in turn by a small amount. The amount is determined by the absolute and relative delta factors as follows:
XSLP_DELTA_A + abs(X)*XSLP_DELTA_R
where ( X) is the current value of the variable. If the perturbation takes the variable outside a bound, then the perturbation normally made only in the opposite direction.

XSLPmaxim, XSLPminim

XSLP_DELTA_A