twentyWines | R Documentation |
twentyWines
:
20 (imaginary) red wines (10 French, 10 American) are rated
(by a semi-fictitious expert)
from 1 to 20,
on multiple sensory dimensions..
data("twentyWines")
A list containing 3 data frames:
df.active
the ratings of the 20 wines for
Sugar
and Astringent
.
supplementary.variables
stores the long names of the wines,
and the ratings of the 20 wines
for the supplementary variables
Acid, Bitter, Fruity, Woody
,
and the Origin
of the wines (French vs USA).
supplementary.observation
the ratings for the
mystery wine (Trius Red: a wine from Ontario).
The data are derived from real data but have been "massaged" to be nice (e.g., means, variances, eigenvalues, are integers). The 10 French wines were a mix of Carbernet-Sauvignon and Merlot grapes and the 10 American wines were made from Zinfandel grapes.
The wines were first evaluated on Sugar
and
Astringent
; these 2 dimensions are stored in the
data frame df.active
.
After the evaluation of the 20 wines was performed,
the expert was also
asked to evaluate (on the same dimensions) another red wine
(Trius: a Cabernet-Merlot from Ontario, Canada). The results
for this wine are stored in the data frame:
supplementary.observation
After the first evaluation of the 21 wines,
the (semi-fictitious) expert rated the
wine on 2 other dimensions: Acid
and Bitter
.
Incidently, the expert (even though semi-fictitious) spontaneously
commented that some wines were Fruity
or Woody
.
The long names of the wines, the origin of the wines
(F
for French and U
for USA), the additional ratings,
and the comments are stored in the data frame
supplementary.variables
.
Hervé Abdi and Dominique Valentin
These ratings were (strongly) inspired by the Words example from:
Abdi, H., Edelman, B., Valentin, D., & Dowling, W.J. (2009). Experimental Design and Analysis for Psychology. Oxford: Oxford University Press.
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