Learn R Programming

robCompositions (version 2.4.1)

coffee: coffee data set

Description

30 commercially available coffee samples of different origins.

Usage

data(coffee)

Arguments

Format

A data frame with 30 observations and 7 variables.

Author

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

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.

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

Run this code

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

Run the code above in your browser using DataLab