Description Usage Format Source Examples
Example comparing used versus available blue grouse winter habitat described by the basal area measurements of four species of trees present in stands on winter range.
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A data frame with 16 observations on the following 5 variables.
use
An indicator of which habitat was used by blue grouse (1) and which was available (2).
dfir
Basal area (m^2/ha) for Douglas-fir.
junip
Basal area (m^2/ha)for juniper.
aspen
Basal area (m^2/ha)for aspen.
other
Basal area (m^2/ha)for other trees.
Cade, B.S., and R.W. Hoffman. 1990. Winter use of Douglas-fir forests by blue grouse in Colorado. Journal of Wildlife Management 54, 471–479.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Use<-c("Used","Available")
par(mfrow = c(2,2),mar = c(3,4,3,2))
boxplot(habitat$dfir~Use[habitat$use],col = "darkgreen",
main = "Fir basal area measurement\n in used and available habitat",
ylab = "Basal Area Measurement")
boxplot(habitat$junip~Use[habitat$use],col = "blue",
main = "Juniper basal area measurement\n in used and available habitat",
ylab = "Basal Area Measurement")
boxplot(habitat$aspen~Use[habitat$use],col = "orange",
main = "Aspen basal area measurement\n in used and available habitat",
ylab = "Basal Area Measurement")
boxplot(habitat$other~Use[habitat$use],col = "brown",
main = "Other basal area measurement\n in used and available habitat",
ylab = "Basal Area Measurement")
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