Excellent tutorials, Chuck. But in the example above (and in post #5) it would be useful to help us understand what c1,c2,c3,c4 mean... and in this latest example, which colname is associated with the interaction coefficient.
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Excellent tutorials, Chuck. But in the example above (and in post #5) it would be useful to help us understand what c1,c2,c3,c4 mean... and in this latest example, which colname is associated with the interaction coefficient.