MATLAB OPTIMIZATION TOOLBOX - RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 68)

R2007a

17-2

Changes to Outputs of Multiobjective Solvers

• fminimax now returns the value of max(fval) in the output maxfval.

• The iterative display of fminimax and fgoalattain have changed.

Compatibility Considerations

• The third output argument of the solver fminimax, maxfval, is described in the

documentation as the maximum of the objective functions in the input fun evaluated

at the solution x, that is, max(fval). Before this release, fminimax actually

returned the maximum of the objective functions in the reformulated minimax

problem internally constructed by the algorithm. This value was typically very close

to, but not necessarily equal to, max(fval). fminimax now returns the exact value of

max(fval) in the output maxfval.

• The iterative display for fminimax includes a new column with header Objective

value that reports the objective function value of the nonlinear programming

reformulation of the minimax problem. The column header Max{F,constraints}

has been changed to Max constraint, and the column now contains the maximum

violation among all constraints, both internally constructed and user-provided.

The iterative display for fgoalattain now shows the value of the attainment factor

in the Attainment factor column. A new column, Max constraint, contains

the maximum violation among all constraints, both internally constructed and user-

provided.

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MATLAB OPTIMIZATION TOOLBOX - RELEASE NOTES Manuel d'utilisateur Page 68