Discriminant Analysis Options

The following commands are available from the Discriminant Analysis red triangle menu.

Stepwise Variable Selection

Selects or deselects the Stepwise control panel. See Stepwise Variable Selection.

Discriminant Method

Selects the discriminant method. See Discriminant Methods.

Discriminant Scores

Shows or hides the Discriminant Scores portion of the report.

Score Options

Provides several options connected with the scoring of the observations. In particular, you can save the scoring formulas. See Score Options.

Canonical Plot

Shows or hides the Canonical Plot. See Canonical Plot and Canonical Structure.

Canonical Options

Provides options that affect the Canonical Plot. See Canonical Options.

Canonical 3D Plot

Shows a three-dimensional canonical plot. This option is available only when there are four or more levels of the categorical X. See Example of a Canonical 3D Plot.

Specify Priors

Enables you to specify prior probabilities for each level of the X variable. See Specify Priors.

Consider New Levels

Used when you have some points that might not fit any known group, but instead might be from an unscored new group. For details, see Consider New Levels.

Show Within Covariances

Shows or hides these reports:

–

A Covariance Matrices report that gives the pooled-within covariance and correlation matrices.

–

For the Quadratic and Regularized methods, a Correlations for Each Group report that shows the within-group correlation matrices.

For each group, the log of the determinant of the within-group covariance matrix is also shown.

–

For the Quadratic discriminant method, adds a Group Covariances outline to the Covariance Matrices report that shows the within-group covariance matrices.

Show Within Covariances is not available for the Wide Linear discriminant method.

Show Group Means

Shows or hides a Group Means report that provides the means of each covariate. Means for each level of the X variable and overall means appear.

Save Discrim Matrices

Saves a script called Discrim Results to the data table. The script is a list of the following objects for use in JSL:

–

a list of the covariates (Ys)

–

the categorical variable X

–

a list of the levels of X

–

a matrix of the means of the covariates by the levels of X

–

the pooled-within covariance matrix

Save Discrim Matrices is not available for the Wide Linear discriminant method. See Save Discrim Matrices.

Scatterplot Matrix

Opens a separate window containing a Scatterplot Matrix report that shows a matrix with a scatterplot for each pair of covariates. The option invokes the Scatterplot Matrix platform with shaded density ellipses for each group. The scatterplots include all observations in the data table, even if validation is used. See Scatterplot Matrix.

Not available for the Wide Linear discriminant method.

See Local Data Filter, Redo Menus, and Save Script Menusin the Using JMP book for more information about the following options:

Local Data Filter

Shows or hides the local data filter that enables you to filter the data used in a specific report.

Redo

Contains options that enable you to repeat or relaunch the analysis. In platforms that support the feature, the Automatic Recalc option immediately reflects the changes that you make to the data table in the corresponding report window.

Save Script

Contains options that enable you to save a script that reproduces the report to several destinations.

Save By-Group Script

Contains options that enable you to save a script that reproduces the platform report for all levels of a By variable to several destinations. Available only when a By variable is specified in the launch window.