R: The effect of terbuthylazin on growth rate

terbuthylazin {drc} | R Documentation

## The effect of terbuthylazin on growth rate

### Description

Test on the effect of terbuthylazin on Lemna minor, performed on an aseptic culture according to the OECD-guidelines.

### Usage

    data(terbuthylazin)

### Format

A data frame with 30 observations on the following 2 variables.

dose

  a numeric vector of dose values.

rgr

  a numeric vector of relative growth rates.

### Details

Dose is

μ l^{-1}

and rgr is the relative growth rate of Lemna.

### Source

Cedergreen N. (2004). Unpublished bioassay data.

### Examples

    ## displaying first 6 rows of the data set
    head(terbuthylazin)

    ## Fitting log-logistic model
    terbuthylazin.m1 <- drm(rgr~dose, data = terbuthylazin, fct = LL.4())
    summary(terbuthylazin.m1)

    ## Fitting log-logistic model
    ##  with Box-Cox transformation
    terbuthylazin.m2 <- boxcox(terbuthylazin.m1, method = "anova")
    summary(terbuthylazin.m2)

[Package drc version 3.0-1 Index]