A data frame with 18 observations on 8 variables:
rll{
[ , 1] factor winters
[ , 2] factor shadow
[ , 3] factor tubers
[ , 4] factor color
[ , 5] ordered soil
[ , 6] ordered preference
[ , 7] numeric height
[ , 8] numeric distance
} winters is binary and indicates whether the plant may be left
in the garden when it freezes.
shadow is binary and shows whether the plant needs to stand
in the shadow.
tubers is asymmetric binary and distinguishes between plants
with tubers and plants that grow in any other way.
color is nominal and specifies the flower's color (1 = white,
2 = yellow, 3 = pink, 4 = red, 5 = blue).
soil is ordinal and indicates whether the plant grows in dry
(1), normal (2), or wet (3) soil.
preference is ordinal and gives someone's preference ranking
going from 1 to 18.
height is interval scaled, the plant's height in centimeters.
distance is interval scaled, the distance in centimeters that
should be left between the plants.