iris
Edgar Anderson's Iris Data
This famous (Fisher's or Anderson's) iris data set gives the measurements in centimeters of the variables sepal length and width and petal length and width, respectively, for 50 flowers from each of 3 species of iris. The species are Iris setosa, versicolor, and virginica.
- Keywords
- datasets
Usage
iris
iris3Format
iris is a data frame with 150 cases (rows) and 5 variables
(columns) named Sepal.Length, Sepal.Width,
Petal.Length, Petal.Width, and Species.
iris3 gives the same data arranged as a 3-dimensional array
of size 50 by 4 by 3, as represented by S-PLUS. The first dimension
gives the case number within the species subsample, the second the
measurements with names Sepal L., Sepal W.,
Petal L., and Petal W., and the third the species.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
The New S Language.
Wadsworth & Brooks/Cole. (has iris3 as iris.)
See Also
matplot some examples of which use
iris.
Examples
library(datasets)
# NOT RUN {
dni3 <- dimnames(iris3)
ii <- data.frame(matrix(aperm(iris3, c(1,3,2)), ncol = 4,
dimnames = list(NULL, sub(" L.",".Length",
sub(" W.",".Width", dni3[[2]])))),
Species = gl(3, 50, labels = sub("S", "s", sub("V", "v", dni3[[3]]))))
all.equal(ii, iris) # TRUE
# }