Tolerance

Syntax: FIT\TOLERANCE eps y=expression
FIT\WEIGHTS\TOLERANCE w eps y=expression
FIT\ITMAX\TOLERANCE n eps y=expression
FIT\WEIGHTS\ITMAX\TOLERANCE w n eps y=expression

The \TOLERANCE qualifier allows the user to specify the fitting tolerance, which has a default value of 0.00001. This value is used in calculating the central difference formula for the partial derivatives, that is, f(x,p)/∂p is approximated by [f(x,p(1+ε))-f(x,p(1-ε))]/[2pε] where ε is the tolerance parameter, eps.

This value is also used to determine when the fit is successful.

  Method
  Correlation and covariance