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finney
2007 Jul 12
1
dose-response on a grid
I have the following problem. I have measured a dose response curve
(binary response, continuous dose) on a grid of x,y positions. I would
like to produce a grey-level plot that shows the LD50 at each (x,y)
position.
I am thinking that I have to do something like
fit<-glm(resp ~ x*y + dose, family = binomial)
Corrections welcome.
But from here I don't know how to get LD50, and certainly