| chlorsulfuron {nlreg} | R Documentation |
Chlorsulfuron Data
Description
The chlorsulfuron data frame has 51 rows and 3 columns.
Bioassay on the action of the herbicide chlorsulfuron on the callus area of colonies of Brassica napus L. The experiment consists of 51 measurements for 10 different dose levels. The design is unbalanced: the number of replicates per dose varies from a minimum of 5 to a maximum of 8.
Usage
data(chlorsulfuron)Format
This data frame contains the following columns:
group-
indicator variable for each tested dose;
dose-
the tested dose (nmol/l);
area-
the callus area (
mm^2).
Source
The data were obtained from
Seiden, P., Kappel, D. and Streibig, J. C. (1998) Response of Brassica napus L. tissue culture to metsulfuron methyl and chlorsulfuron. Weed Research, 38, 221–228. Dataset C3.
References
Bellio, R., Jensen, J.E. and Seiden, P. (2000). Applications of likelihood asymptotics for nonlinear regression in herbicide bioassays. Biometrics, 56, 1204–1212.
Brazzale, A. R. (2000) Practical Small-Sample Parametric Inference. Ph.D. Thesis N. 2230, Department of Mathematics, Swiss Federal Institute of Technology Lausanne. Section 5.3, Example 8.
Examples
data(chlorsulfuron)
attach(chlorsulfuron)
plot(dose, area, xlab = "tested dose (nmol/l)",
ylab = "log callus area (mm^2)", log = "y")
detach()