Dune Meadow Data

Description

dunedata is a data set containing for 20 sites, environmental variables and plant species.

Usage

data(dunedata)

Format

dunedata is a list with 2 components.

envir

is a data frame with 20 rows (sites) 5 columns (environnemental variables).

veg

is a data frame with 20 rows (sites) 30 columns (plant species).

Source

Jongman, R. H., ter Braak, C. J. F. and van Tongeren, O. F. R. (1987) Data analysis in community and landscape ecology, Pudoc, Wageningen.

Examples

data(dunedata)
summary(dunedata$envir)
is.ordered(dunedata$envir$use)
score(dudi.mix(dunedata$envir, scan = FALSE))

Worked out examples

> library(ade4)
> ### Name: dunedata
> ### Title: Dune Meadow Data
> ### Aliases: dunedata
> ### Keywords: datasets
> 
> ### ** Examples
> 
> data(dunedata)
> summary(dunedata$envir)
       A1            moisture       manure           use    management
 Min.   : 2.800   Min.   :1.0   Min.   :0.00   hayfield:7   BF:3      
 1st Qu.: 3.500   1st Qu.:1.0   1st Qu.:0.00   both    :8   HF:5      
 Median : 4.200   Median :2.0   Median :2.00   grazing :5   NM:6      
 Mean   : 4.850   Mean   :2.9   Mean   :1.75                SF:6      
 3rd Qu.: 5.725   3rd Qu.:5.0   3rd Qu.:3.00                          
 Max.   :11.500   Max.   :5.0   Max.   :4.00                          
> is.ordered(dunedata$envir$use)
[1] TRUE
> score(dudi.mix(dunedata$envir, scan = FALSE))

> 
> 
> 
>