[R] understanding the 4 parameter logisitc regression

[1Rnwb]

Thanks Dieter for the help. This is how I want
plot(log(test$conc),fn(test$conc,15,3.5,600,1/2.5),type="l") # looks good

points(log(test$conc),log(test$il10)) 

regards and happy holidays
sharad
 
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