R: coffee data set

coffee {robCompositions} | R Documentation

## coffee data set

### Description

30 commercially available coffee samples of different origins.

### Usage

    data(coffee)

### Format

A data frame with 30 observations and 7 variables.

### Details

- `sort` sort of coffee

- `acit` acetic acid

- `metpyr` methylpyrazine

- `furfu` furfural

- `furfualc` furfuryl alcohol

- `dimeth` 2,6 dimethylpyrazine

- `met5` 5-methylfurfural

In the original data set, 15 volatile compounds (descriptors of coffee aroma) were selected for a statistical analysis. We selected six compounds (compositional parts) on three sorts of coffee.

### Author(s)

Matthias Templ matthias.templ@tuwien.ac.at, Karel Hron

### References

M. Korhonov\'a, K. Hron, D. Klimc\'ikov\'a, L. Muller, P. Bedn\'ar, and P. Bart\'ak (2009). Coffee aroma - statistical analysis of compositional data. Talanta, 80(2): 710–715.

### Examples

    data(coffee)
    str(coffee)
    summary(coffee)

[Package robCompositions version 2.0.6 Index]