| A | B |
|---|---|
| The trial value of the parameter used initially in the fit | |
| The step size used in the numerical determination of the derivatives used during the fitting process. When delta is set to zero, the parameter is not adjustable during the fit. This value may be overriden for all parameters by the xset delta command option, which will apply a proportional rather than a fixed delta. |
(echo:: @ ᯤ)