Description Format Source References Examples
Masses of cones of lodgepole pines (conemass
) from 16 different
habitat types (habitat
) in western North America.
A data frame with 16 observations on the following 4 variables.
a factor with levels: island
absent
, island present
, and mainland present
mass of cone
island
or mainland
absent
or
present
Edelaar, P. and C.W. Benkman. 2006. Replicated population divergence caused by localised coevolution? A test of three hypotheses in the Red Crossbill-lodgepole pine system. Journal of Evolutionary Biology 19: 1651-1659.
http://en.wikipedia.org/wiki/Lodgepole_pine
http://en.wikipedia.org/wiki/Red_crossbill
1 2 3 | LodgepolePines
str(LodgepolePines)
xyplot(conemass ~ habitat, LodgepolePines)
|
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