search for: inddependent

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2012 Jul 10
1
outer() or some other function for regression prediction with 2 IVs
Hi there, I'm trying to prep some data for a persp() surface plot representing the predictions from a regression with two inddependent variables. The regression model "m3" has an intercept, 2 linear terms, and 2 squared terms. The coefficients are given by coef(m3). My approach to generating the predictions for a range of each of my IVs, "s" and "d" was to use outer() like so: predxn <-...