MATLAB OPTIMIZATION TOOLBOX - RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 38)

R2011b

8-4

is 'on'). If you provide gradients, have no linear constraints, and want to obtain the

previous behavior, set ScaleProblem to 'obj-and-constr' with optimset.

fsolve trust-region-dogleg Algorithm Change

The fsolve trust-region-dogleg algorithm no longer performs an internal calculation

of conditioning. This change usually speeds fsolve.

Compatibility Considerations

fsolve iterations differ from previous versions. Additionally, the solution and all

associated outputs can differ from previous versions. Usually, results are numerically

equivalent to previous results.

Conversion of Error and Warning Message Identifiers

For R2011b, error and warning message identifiers have changed in Optimization

Toolbox™.

Compatibility Considerations

If you have scripts or functions that use message identifiers that changed, you must

update the code to use the new identifiers. Typically, message identifiers are used to turn

off specific warning messages, or in code that uses a try/catch statement and performs

an action based on a specific error identifier.

For example, the 'optim:fmincon:ConstrainedProblemsOnly' identifier has

changed to 'optimlib:fmincon:ConstrainedProblemsOnly'. If your code checks

for 'optim:fmincon:ConstrainedProblemsOnly', you must update it to check for

'optimlib:fmincon:ConstrainedProblemsOnly' instead.

To determine the identifier for a warning, run the following command just after you see

the warning:

[MSG,MSGID] = lastwarn;

This command saves the message identifier to the variable MSGID.

To determine the identifier for an error, run the following command just after you see the

error:

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MATLAB OPTIMIZATION TOOLBOX - RELEASE NOTES Manuel d'utilisateur Page 38