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Re: st: RE: graph interaction curve

From   Nick cox <>
To   "" <>
Subject   Re: st: RE: graph interaction curve
Date   Fri, 25 Feb 2011 21:25:34 +0000

This applies to products calculated directly too. If your code doesn't work, it must include one or more bugs. What else can we say?


On 25 Feb 2011, at 18:20, Fabio Zona <> wrote:

does this solution work only with the functions c. ## ??
can I calculate the interactions as products of variables (standardized variables) and the apply this method? If so, why doesn't it work with me?

----- Messaggio originale -----
Da: "Nick Cox" <>
A: "" <>
Inviato: Venerdì, 25 febbraio 2011 17:27:18 GMT +01:00 Amsterdam/Ber lino/Berna/Roma/Stoccolma/Vienna
Oggetto: st: RE: graph interaction curve

The short answer is No. There isn't an easy way, but there is a way to solve this nevertheless. Maarten already posted a concrete example at

That is, get a series of predictions for different values of the moderator and plot them as a series of lines in the (X, Y) space.

So, the same question gets the same answer.

Otherwise we need to see something new from you, e.g. specific detail on how you wrote code that doesn't work, etc.


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