The PROC LATTICE statement invokes the LATTICE procedure.
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DATA=SAS-data-set
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names the SAS data set to be used by PROC LATTICE. If you omit the DATA= option, the most recently created SAS data set is
used.
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COVARIANCE
COV
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calculates sums of products for every possible pair of response variables. A sum of products is given for each source of variation
in the analysis of variance table. For each pair of response variables, the one appearing later in the data set (or in the
VAR statement) is the covariable.