optimplotfval

Plot the function value of an optimization algorithm

SYNOPSIS

optimplotfval ( x , optimValues , state )

Description

This function creates and updates a plot of the function value, depending on the number of iterations. It is a pre-defined plot function which should be used as an option of the “PlotFcns” option.

Example

In the following example, we use the optimplotfval function for use with the fminsearch function.

function y=rosenbrock(x)
  y = 100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
endfunction
opt = `optimset`_ ( "PlotFcns" , optimplotfval );
[x fval] = `fminsearch`_ ( rosenbrock , [-1.2 1] , opt );

See Also

• optimset Configures and returns an optimization data structure.
• fminsearch Computes the unconstrained minimimum of given function with the Nelder-Mead algorithm.
• optimplotx Plot the value of the parameters of an optimization algorithm
• optimplotfunccount Plot the number of function evaluations of an optimization algorithm