3
I would like to know how to correlate two dose response curves of the "drc"?
Example:
ryegrass.m1 <- drm(rootl~conc, data = ryegrass, fct = LL.4())
ryegrass.m2 <- drm(rootl~conc, data = ryegrass, fct = LL.3())
cor (ryegrass.m1, ryegrass.m2) #Não funciona
My goal is to know if the curves are statistically equal or different. And to plot this correlation leave something more visual, is it right to plot like this? In this example the curve of model 2 is practically all within the confidence interval of the other curve, this means that they are statistically equal?
plot(ryegrass.m1, broken = TRUE)
plot(ryegrass.m2, broken = TRUE, add = TRUE, type = "none", col = 2, lty = 2)
plot(ryegrass.m1, broken = TRUE, type="confidence", add=TRUE)