I would like to graph a quadratic interaction after running rreg
(Robust Regression). The model is as follows:
xi:rreg Y i.X1 X2 X3 X4 X5 X5squared X5*X4 X5squared*X4
(interaction terms are centered)
Where:
X5 -- independent variable
X5squared--square of the independent variable
X4-moderator
X5*X4--independent variable x moderator
X5squared*X4--independent variable squared x moderator
The rest (X1 X2 X3) are controls which I want to account for as well.
One standard deviation above and below the mean would be fine.
I want to include both components of the interaction (linear and
quadratic). Is there a module that will do it? If not, what is the
optimum graphing command.
Any help would be much appreciated. I need a pretty graph.
Susanna
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