onecurve {drc} | R Documentation |
Data are from an experiment assessing the inhibitory effect effect of secalonic acids on plant growth.
data(onecurve)
A data frame with 7 observations on the following 2 variables.
Dose
Root
The root lengths are each averages of three measured root lengths.
The dataset is analysed in Gong et al (2004).
Gong, X. and Zeng, R. and Luo, S. and Yong, C. and Zheng, Q. (2004) Two new secalonic acids from Aspergillus Japonicus and their allelopathic effects on higher plants, Proceedings of International Symposium on Allelopathy Research and Application, 27-29 April, Shanshui, Guangdong, China (Editors: R. Zeng and S. Luo), 209–217.
## Fitting a 4-parameter log-logistic model model.onecurve <- multdrc(Root~Dose, data=onecurve) ## Fitting a 3-parameter log-logistic model ## lower limit fixed at 0 model.onecurve.noC <- multdrc(Root~Dose, data=onecurve, fct=l3()) rm(model.onecurve, model.onecurve.noC)