The MWPCA Procedure
ID Statement
ID variable;
The ID statement lists one variable from the data set that specifies the order of the observations in the input data set. This variable is not considered as part of the analysis to compute the principal components. Also, the values of variable should be unique with a common difference.
The following examples show values of the variables that you can use as ID variables:
1, 3, 5, 7, …
2.2, 2.7, 3.2, 3.7, 4.2, 4.7, …
The following examples show values of the variables that you cannot use as ID variables:
1, 2, 5, 6, 7, …(these values do not have a common difference)
1, 2, 3, 3, 4, 5, 6, 7, …(these values are not unique)
The ID statement is required. Without this statement, windows cannot be identified.
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Last updated: November 11, 2020