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.
Usage
eagles
Format
The eagles data frame has 8 rows and 5 columns.
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).
Source
Knight, R. L. and Skagen, S. K. (1988)
Agonistic asymmetries and the foraging ecology of Bald Eagles.
Ecology69, 1188–1194.
References
Venables, W. N. and Ripley, B. D. (1999)
Modern Applied Statistics with S-PLUS. Third
Edition. Springer.
Examples
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)
Results
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
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> library(MASS)
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/MASS/eagles.Rd_%03d_medium.png", width=480, height=480)
> ### Name: eagles
> ### Title: Foraging Ecology of Bald Eagles
> ### Aliases: eagles
> ### Keywords: datasets
>
> ### ** Examples
>
> eagles.glm <- glm(cbind(y, n - y) ~ P*A + V, data = eagles,
+ family = binomial)
> dropterm(eagles.glm)
Single term deletions
Model:
cbind(y, n - y) ~ P * A + V
Df Deviance AIC
<none> 0.333 23.073
V 1 53.737 74.478
P:A 1 6.956 27.696
> prof <- profile(eagles.glm)
> plot(prof)
> pairs(prof)
>
>
>
>
>
> dev.off()
null device
1
>