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A number of analyses perform operations on subsets. Making it clear what observations have been excluded or included is helpful to include in the output.SASThe where statement (section A.6.3) is a powerful and useful tool for subsetting on the fly. (Other options for subsetting typically require data steps or data set options in the proc statement.) But one problem with subsetting in SAS is Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
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