The Method Tab :: SAS/IML(R) Studio 12.3: User's Guide

The Method Tab

You can use the Method tab to set options in the analysis. (See Figure 31.9.) The tab supports the following options:

Cross levels of row variables

specifies that each combination of levels for all row variables become a row label. When not selected, each level of every row variable becomes a row label. This corresponds to the CROSS=ROW option in the PROC CORRESP statement.

Cross levels of column variables

specifies that each combination of levels for all column variables become a column label. When not selected, each level of every column variable becomes a column label. This corresponds to the CROSS=COL option in the PROC CORRESP statement.

Selecting both of the previous options corresponds to specifying the CROSS=BOTH option in the PROC CORRESP statement; clearing both of the previous options corresponds to specifying the CROSS=NONE option.

Missing values

specifies whether to include observations with missing values in the analysis.

Exclude from analysis: specifies that observations with missing values be excluded from the analysis.
Use as category levels: specifies that missing values be treated as a distinct level of each categorical variable. This corresponds to the MISSING option in the PROC CORRESP statement.

Number of dimensions

specifies the number of principal coordinates to use for the analysis. You can type a value in this field. If your contingency table is an $R \times C$ table, the number of dimensions in the correspondence analysis is at most $\min ( R-1, C-1)$ . This corresponds to the DIMENS= option in the PROC CORRESP statement.

Standardize coordinates from

specifies the standardization for the row and column coordinates. This corresponds to the PROFILE= option in the PROC CORRESP statement.

Figure 31.9: The Method Tab