[R] drc - package

[sahnerolle]

Hi,

my english is not the best, i hope its comprehensible. Can i ask here in
german too?

my problem:
I have plottet a curve with weibull1.4. I want to define a value on the
y-axis and get the value of the x-axis for the plotted curve.

This is my command:

library(drc)
effect<-c(0,22.84,40.74,54.63,62.04,59.26)
conc<-c(0,90,150,260,440,750)
drm(effect~conc,fct=W1.4())
model<-drm(effect~conc,fct=W1.4())
summary(model)
plot(model)
ED(model,c(50),interval='delta')

With: "ED(model,c(50),interval='delta')" i get a value, but it is not on the
fitted curve. What to do?

Thanks
Fabian



--
View this message in context: http://r.789695.n4.nabble.com/drc-package-tp4676924.html
Sent from the R help mailing list archive at Nabble.com.