Optimization Toolbox Release Notes

Upgrading from an Earlier Release

This section describes the upgrade issues involved in moving from the Optimization Toolbox 2.1.1 to Version 2.2.

If you are upgrading from a version earlier than 2.1.1, then you should also see Upgrading from an Earlier Release in the Optimization Toolbox 2.1. Release Notes.

fsolve Now Defaults to New Medium-Scale Method

In keeping with the new default trust-region dogleg algorithm, fsolve now defaults to the medium-scale method. The default for the 'LargeScale' parameter is changed to 'off'.

Using the Large-Scale Method

If you want to continue using the large-scale fsolve method, which was the default in Versions 2.0 and 2.1, you must explicitly specify the large-scale method using code similar to

• options = optimset('LargeScale','on');
  xsol = fsolve(myfun,x0,options);
  

Using the Gauss-Newton Method

In prior releases to get the Gauss-Newton method you did:

• options = optimset('LargeScale','off',...
                     'LevenbergMarquardt','off');
  

For this release you do:

• options = optimset('LargeScale','off',...
                     'NonlEqnAlgorithm','gn');
  

Note    Strictly speaking, it is unnecessary to set 'LargeScale' to 'off', unless you have previously set it 'on'.

Using the Levenberg-Marquardt Method

In prior releases to get the Levenberg-Marquardt method you did:

• options = optimset('LargeScale','off',...
                     'LevenbergMarquardt','on');
  

For this release you do:

• options = optimset('largescale','off',...
                     'NonlEqnAlgorithm','lm');
  

Use playshow Command to Run Slideshow Style Demos

Starting in Release 13, to run slideshow style demos from the command line, you must use the playshow command. For example,

• playshow circustent
  

You can continue to run other styles of demos from the command line by typing just the demo name. Optimization Toolbox demos that are affected: circustent, molecule, optdeblur.

Major Bug Fixes

Optimization Toolbox 2.1.1 Release Notes