Specifying the Solution Quantity to Evaluate for Statistical Analysis
When you add a statistical setup, you can identify one or more solution quantities to evaluate. The solution quantities are specified by mathematical expression composed of basic quantities. When you view the results, Twin Builder displays the distribution of the solution quantities.
- In the Calculations tab of the Setup Statistical Analysis dialog box, click SetupCalculations. The Add/Edit Calculations dialog box appears. Use this dialog box to define one or more mathematical expressions for statistical evaluation.
- In the Context section of the dialog box:
- Select the Report Type with a drop-down list containing the available types for this design.
- Select the Solution from the drop-down list. This lists the available setups and sweeps. As a minimum, the LastAdaptive solution is available.
- Select the Geometry from the drop-down list or select none. This modifies the list of quantities available to the ones that apply to the specific geometry.
- When selecting a geometry, you may also be required to specify a point within the geometry where the calculation is to be performed.
- Click Output Variables to open the Output Variables dialog box. Use this dialog box to create special output variables used in the output parameter.
- Use the Calculation Expression field in the Trace tab to enter the equation used for the solution quantities. To enter an expression, type it directly into the field or use the Category, Quantity, and Function lists as follows:
- Select the Category. These depend on the Solution type and the design. This lets you specify the category of information used in the output parameter.
- Select a Quantity from the list. Available quantities depend upon the Solution type, as well as the Geometry and Category selection. Selecting a Quantity enters it into the Calculation Expression field.
- Select a Function to apply to the value in the calculated expression.
- For swept variables, click Range Function to open the Set Range Function dialog box to apply functions to the expression that apply over the sweep range.
- The Calculation Range tab applies to swept variables and lets you specify the range of the sweep over which to apply the calculation.
- When the desired Calculation Expression is obtained, click Add Calculation to add the entry to the calculation table in the Setup Statistical Analysis dialog box. To add multiple entries to the table, change the Calculated Expression and click Add Calculation.
- To update or edit a selected cost function, enter the desired Calculation Expression and click Update Calculation.
- Click Done to return to the Setup
Statistical Analysis dialog box.
Note:
The solution quantity you specify must be able to be evaluated to a single, real number.