## Volume of algae as function of increasing concentrations of a herbicide

### Description

Dataset from an experiment exploring the effect of increasing concentrations of a herbicide on
the volume of the treated algae.

### Usage

data(algae)

### Format

A data frame with 14 observations on the following 2 variables.

`conc`

a numeric vector of concentrations.

`vol`

a numeric vector of response values, that is relative change in volume.

### Details

This datasets requires a cubic root transformation in order to stabilise the variance.

### Source

Meister, R. and van den Brink, P. (2000)
*The Analysis of Laboratory Toxicity Experiments*,
Chapter 4 in *Statistics in Ecotoxicology*, Editor: T. Sparks,
New York: John Wiley \& Sons, (pp. 114–116).

### Examples

algae.m1 <- drm(vol~conc, data=algae, fct=LL.3())
summary(algae.m1)
algae.m2 <- boxcox(algae.m1)
summary(algae.m2)