Dear R People:

I am using Response Surface Models and and also using the "persp" function
to plot them.

Today my particular model is y~ x1 + x2 + x3

I can fit my RSM easily.  My question is:  how do I use the persp such that
I can fix the x3 at a particular value, please?

> smell.code <- coded.data(smell.df,x1~(T-80)/40,x2~(R-0.5)/0.2,x3~(H-4)/2)
> smell.rsm <- rsm(Odor~SO(x1,x2,x3),data=smell.code)
>

> persp(smell.rsm,x1~x2,contour=TRUE)
>

I would like to set the x3 to be at the optimum value (available from the
model)

Thanks in advance for any help.


Sincerely,
Erin

-- 
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess@gmail.com

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