[R] Optimum of lm

ben1983 ben_thompson at talk21.com
Mon Jul 1 23:13:26 CEST 2013

Hi All, 
          I am trying to do some D o E. I would like to find the optima
(maxima) of a 2 dimensional lm with quadratic terms.
I'm sure there is a really simple solution but i can't find it.
Also would there be any way to find some sort of confidence limits on these
Any help most appreciated!

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