A gpl question. The context is interaction plotting. In legacy terms, think of this (GRAPH /LINE(MULTIPLE)=MEAN(yhat) BY ace BY dir.) translated to gpl (of which there is an example to copy!). My question is this. I’d like to shade the
region of significance for the interaction. In this specific example the moderator, dir, has 6 discrete values and for each I can compute the ace value at which the interaction slope become significant. Those values when connected by line segments define the
boundary for the right side region of significance, which would look nice in an explanatory way, if it were shaded. Doable? If so, I think the key piece of code needed is the components of the element command.
Thanks, Gene Maguin
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