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john_sall
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Exclude weakly-crossed columns

Hides columns that have few levels across a classification. For example suppose that you are looking for variables that change in interesting ways across many years. But some of your survey questions are only asked 1 or 2 of those years, so they would not be interesting. So you want to Hide and Exclude those "weakly crossed" columns so that you can select the rest to examine.

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