O.mykiss {drc} | R Documentation |
Test data from a 21 day fish test following the guidelines OECD GL204, using the test organism Rainbow trout Oncorhynchus mykiss.
data(O.mykiss)
A data frame with 70 observations on the following 2 variables.
conc
weight
Weights are measured after 28 days.
Organisation for Economic Co-operation and Development (OECD) (2006) CURRENT APPROACHES IN THE STATISTICAL ANALYSIS OF ECOTOXICITY DATA: A GUIDANCE TO APPLICATION - ANNEXES, Paris (p. 65).
Organisation for Economic Co-operation and Development (OECD) (2006) CURRENT APPROACHES IN THE STATISTICAL ANALYSIS OF ECOTOXICITY DATA: A GUIDANCE TO APPLICATION - ANNEXES, Paris (pp. 80–85).
head(O.mykiss) ## Fitting exponential model O.mykiss.m1<-drm(weight~conc, data=O.mykiss, fct=EXD.2(), na.action=na.omit) summary(O.mykiss.m1) anova(O.mykiss.m1) ## Fitting same model with transform-both-sides approach O.mykiss.m2<-drm(weight~conc, data=O.mykiss, fct=EXD.2(), na.action=na.omit, adjust="bc1") summary(O.mykiss.m2) # no need for a transformation ## Plotting the fit plot(O.mykiss.m1, type = "points", xlim = c(0, 500), ylim = c(0,4), xlab = "Concentration (mg/l)", ylab = "Weight (g)", broken = TRUE)