You can use the PATHDIAGRAM statement to specify and modify the layout algorithm, to control the formatting of estimates, and to fine-tune many graphical and nongraphical features of path diagrams. You can use multiple PATHDIAGRAM statements to produce path diagrams that have different styles and graphical features.
Specifying a PATHDIAGRAM statement without any options has the same effect as specifying the PLOTS= PATHDIAGRAM option in the PROC FACTOR statement. Both produce a default path diagram for the last factor solution in a PROC FACTOR run. The default path diagrams show the links between factors and variables, the factor correlations, and the error variances in the model. For more information about the default path diagram, see the PLOTS= PATHDIAGRAM option.
The options in the PATHDIAGRAM statement can be classified into three categories, which are summarized in Table 37.2 through Table 37.4. The following three tables summarize these options. An alphabetical listing of these options that includes more details follows the tables.
Table 37.2 shows the options that you can use to specify the path diagram layout algorithm, to set the criteria for displaying the directed paths between variables and factors, and to specify the size of factors relative to the observed variables.
Table 37.2: Options for Controlling the Layout
Option |
Description |
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Specifies the significance level of the loading estimate that is required in order to display the corresponding link between a variable and a factor |
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Specifies the algorithm for laying out variables in the path diagram |
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Specifies the salience criterion on the loading estimate |
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Specifies the size of latent factors relative to observed variables |
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Specifies the magnitude of the loading estimate that is required in order to display the corresponding link between a variable and a factor |
Table 37.3 shows the options that you can use to control the display of parameter estimates in output path diagrams.
Table 37.3: Options for Displaying Parameter Estimates
Option |
Description |
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Specifies the number of decimal places in the estimates |
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Disables the display of all numerical estimates |
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Disables the display of error variances |
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Disables the display of factor variances |
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Disables the display of all variances |
Table 37.4 shows the options that you can use to specify the title, the path diagram label, and the variable labels.
Table 37.4: Options for Specifying Titles and Labels
Option |
Description |
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Specifies the label of the diagram in the ODS |
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Specifies labels of the nodes that are shown in the path diagram |
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Specifies whether the variable names or labels are used to label nodes |
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Suppresses the display of the title |
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Specifies the title to display in the output path diagram |