robCompositions (version 2.1.0)

coffee: 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.

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

# NOT RUN {
data(coffee)
str(coffee)
summary(coffee)
# }