PRINT Subcommand (TREE command)

The PRINT subcommand controls the display of optional tabular output. If the PRINT subcommand is specified, only the output explicitly requested will be produced. The subcommand name is followed by an equals sign (=) and one or more of the following options:

MODELSUMMARY. Model summary. The summary includes the method used, variables included in the model, and variables specified but not included in the model. Shown by default if subcommand omitted.

IMPORTANCE. Predictor importance. Ranks each independent (predictor) variable according to its importance to the model. IMPORTANCE can be specified only for the CRT method; otherwise it is ignored, and a warning is issued.

SURROGATES. Surrogate predictors. Lists surrogate predictors for each split in the tree. Each node is split based on an independent (predictor) variable; for cases in which the value for that predictor is missing, other predictors having high associations with the original predictor are used for classification. These alternative predictors are called surrogates. SURROGATES can be specified only for the CRT and QUEST methods. If surrogates are not computed, this keyword is ignored, and a warning is issued.

CLASSIFICATION. Classification table. Shows the number of cases classified correctly and incorrectly for each category of the dependent variable. A warning is issued if CLASSIFICATION is specified for a scale dependent variable. Shown by default for categorical dependent variables if subcommand omitted.

RISK. Risk estimate and its standard error. A measure of the tree’s predictive accuracy. For categorical dependent variables, the risk estimate is the proportion of cases correctly classified after adjustment for prior probabilities and misclassification costs. For scale dependent variables, the risk estimate is within-node variance. Shown by default if subcommand omitted.

CATEGORYSPECS. Cost, prior probability, score, and profit values used in the analysis. This keyword is ignored if the dependent variable is a scale variable.

TREETABLE. Tree model in tabular format. Summary information for each node in the tree, including parent node number, branch statistics, independent variable value(s) for the node, mean and standard deviation for scale dependent variables or counts and percents for categorical dependent variables.

CPS. Case processing summary. Shown by default if subcommand omitted.

NONE. None of the output controlled by the PRINT subcommand is generated. An error occurs if any other PRINT keyword is specified with NONE.