lcurve.m

L-curve analysis function. Syntax:

    lam_opt=lcurve(lam,err,reg,mode)

Parameters:

       lam - row vector of regularisation parameters

       err - row vector of least squares errors

       reg - row vector of regularisation functional values

      mode - 'log' for logarithmic coordinates and 'linear'
             for linear ones; 'log' is recommended

The function returns the regularisation parameter at the point of the maximum curvature of the L-curve.

Arguments

lam - row vector of regularisation parameters

      err - row vector of least squares errors

      reg - row vector of regularisation functional values

     mode - 'log' for logarithmic coordinates and 'linear'
            for linear ones; 'log' is recommended

The function returns the regularisation parameter at the point
of the maximum curvature of the L-curve.

See also

tikhonov.m, tikhoind.m, ipcs.m, Pseudocontact shift analysis

Version 1.9, authors: Ilya Kuprov