Advanced Solving Options
The advanced solving options are used for finding solving options for cases that are not solved using default settings. MultiStart and Optimize are advanced solving options that allow you to choose between calculation time and accuracy in complex numeric problems.
• To view and select the MultiStart and Optimize options, right-click the function name.
MultiStart
Makes the nonlinear solver attempt to find a global maximum or minimum within the feasible region, rather than a local one. Using MultiStart increases the probability of finding a valid solution for your calculations when initial guess values are uncertain or when the problem cannot be solved using default settings.
• MultiStart is available for the minimize, maximize, find, and minerr functions.
• You can use MultiStart with the following nonlinear solving algorithms: Nonlinear: Conjugate Gradient, Nonlinear: SQP, Nonlinear: Interior Point, and Nonlinear: Active Set.
• By default, MultiStart is off.
Optimize
Controls how Engineering Notebook handles maximize and minimize evaluations, allowing you to choose between speed and accuracy.
• Optimize is available for the minimize and maximize functions.
• You can use Optimize with the following nonlinear solving algorithms: Nonlinear: Conjugate Gradient, Nonlinear: SQP, Nonlinear: Interior Point, and Nonlinear: Active Set.
• When Optimize is selected, Engineering Notebook uses the fast calculation method. This can affect the accuracy. By default, Optimize is off.
Additional Information
When the MultiStart option is enabled, the result may vary with each recalculation. This can occur when a calculation has multiple valid solutions due to the algorithm’s random selection of guess values. All obtained results are valid for the current version of CTOL.