Campus Livre
optimplotfval
Optimization plot function: objective value at each iteration.
Category: Other public functions: optimfun
Syntax
optimset('PlotFcns', @optimplotfval)Selects the plot for use with solvers such as fminsearch.
Description
Passed in the PlotFcns option, it plots the current best objective value against the iteration number. A curve that flattens shows that the search is converging, while one that keeps falling suggests it has not finished. It is meant to be called by the solver, not directly.
Example
Watch convergence
opts = optimset('PlotFcns', @optimplotfval);
x = fminsearch(@(x) (x - 1)^2, 0, opts);In the app, the plot of the objective value is drawn below the code.