eagles {MASS} | R Documentation |
Knight and Skagen collected during a field study on the foraging behaviour of wintering Bald Eagles in Washington State, USA data concerning 160 attempts by one (pirating) Bald Eagle to steal a chum salmon from another (feeding) Bald Eagle.
y |
Number of successful attempts. |
n |
Total number of attempts. |
P |
Size of pirating eagle (L = large, S = small).
|
A |
Age of pirating eagle (I = immature, A = adult).
|
V |
Size of victim eagle (L = large, S = small).
|
The eagles
data frame has 8 rows and 5 columns.
Knight, R. L. and Skagen, S. K. (1988) Agonistic asymmetries and the foraging ecology of Bald Eagles. Ecology, 69, 1188-1194.
data(eagles) eagles.glm <- glm(cbind(y, n-y) ~ P*A + V, data=eagles, family=binomial) dropterm(eagles.glm) prof <- profile(eagles.glm) plot(prof) pairs(prof)