R: Dose-response profile of degradation of agrochemical using...

lepidium {drc} | R Documentation

## Dose-response profile of degradation of agrochemical using lepidium

### Description

Estimation of the degradation profile of an agrochemical based on soil samples at depth 0-10cm from a calibration experiment.

### Usage

    data(lepidium)

### Format

A data frame with 42 observations on the following 2 variables.

`conc`

  a numeric vector of concentrations (g/ha)

`weight`

  a numeric vector of plant weight (g) after 3 weeks' growth

### Details

It is an experiment with seven concentrations and six replicates per concentration. Lepidium is rather robust as it only responds to high concentrations.

### Source

Racine-Poon, A. (1988) A Bayesian Approach to Nonlinear Calibration Problems, J. Am. Statist. Ass., 83, 650–656.

### Examples

    lepidium.m1 <- drm(weight~conc, data=lepidium, fct = LL.4())

    modelFit(lepidium.m1)

    plot(lepidium.m1, type = "all", log = "")

[Package drc version 3.0-1 Index]