Parameters panel

The Parameters panel allows users to map a worksheet with initial, lower, and upper parameter values for fixed effects. This is a convenient way to use results from another computation to set initial estimates for a model without manually entering values.

Parameter value options can also be specified in the Fixed Effects tab, which is located under the Parameters tab. If the Parameters panel is used, the values in the Fixed Effects tab are overridden.

None: Data types mapped to this context are not included in any analysis or output.

Sort: Up to 5 categorical variable(s) identifying individual data profiles, such as subject ID and gender. A separate analysis is done for each unique combination of sort variable values. It should be the same as the variables set in the Main panel.

Parameter: The parameters used in the structural model.

Initial: The initial value for each parameter.

Lower: The lower limit value for each parameter.

Upper: The upper limit value for each parameter.

Use the Rebuild button to reset the internal worksheet to its default state.

Note:If an internal worksheet is used, input for all values of the sort variables is required.

Note:If only partial estimate information is entered in the Parameters grid (i.e., some estimates are blank), the program will use the estimates from the previous profile.

Parameters.Mapping panel

If an external worksheet is mapped to the Parameters panel, and the parameter names in the worksheet do not match the parameter names in the model, the Parameters.Mapping panel can be used to match external parameter names with internal ones. If the parameter names match or no external parameters worksheet is used, then there is no need to use the Parameters.Mapping panel.

Map an external worksheet with parameters and initial estimates to the Parameters panel.
Select the Parameters.Mapping panel.
The Use Internal Worksheet checkbox is selected by default.
Click Rebuild to update the internal Parameters.Mapping worksheet.
Beside each external parameter name in the Names dialog, select the checkbox underneath the corresponding internal parameter name.
Click OK to accept the matched parameter names and close the dialog.

Note:If the Parameters.Mapping panel is not used when a worksheet is specified for initial estimates, the values shown in the Parameters tab are used.