Model Browser User's Guide

Subfunctions

Those subfunctions that must be edited are as follows:

• function n= i_nfactors(U,b,varargin);
  n= 1;
  

This is the number of input factors. For functions y = f(x) this is 1.

• function n= i_numparams(U,b,varargin);
  n= 4;
  

This is the number of fitted parameters. In this example there are four parameters in the Weibul model.

• function [param,OK]= i_initial(U,b,X,Y)
  param= [2 1 1 1]';
  OK=1;
  

This subfunction returns a column vector of initial values for the parameters to be fitted. The initial values can be defined to be data dependent; hence there is a flag to signal if the data is not worth fitting. In the template file weibul.m there is a routine for calculating a data-dependent initial parameter estimate. If no data is supplied, the default parameter values are used.

Template File

Optional Subfunctions