| salam {bernor} | R Documentation |
This data set contains the data for the salamander mating experiment in McCullagh and Nelder.
data(salam)
A list containing four components:
y | response matrix |
x | fixed effect model matrix |
z | random effect model matrix |
i | random effect index vector |
The structure of these objects is described in the documentation
for bnlogl.
The data involve two salamander populations, called rough butt (R)
and whiteside (W), and each Bernoulli response is the success or
failure of a mating between two salamanders. The four possible
mating types are denoted R/R, R/W, W/R, and W/W (female/male).
The parameterization used is as follows. The four fixed effect parameters
are level parameters for these mating types (column labels for x
give the order). The random effect parameters are the scale parameters
for female and male, in that order. Column labels for z indicate
the animal associated with the random effect, "fR1" meaning female
named R1, and so forth.
McCullagh and Nelder (1989), pages 439-450.
McCullagh, P. and Nelder, J. A. (1989). Generalized Linear Models, second edition. London: Chapman & Hall.