B.5 Lizard Data

The data in lizard.dat are from McCullagh and Nelder (1989) and concern the daytime habits of two species of lizard, grahami and opalinus. They were collected by observing occupied sites or perches and recording the appropriate description, namely species involved, time of day, height and diameter of perch and whether the site was sunny or shaded.

Column Type Description
1 binary indicator for the height of the perch (in feet):
0 if $ <5$, 1 if $ \ge 5$
2 binary indicator for the diameter of the perch (in inch):
0 if $ \le 2$, 1 if $ >2$
3 binary indicator whether the site was sunny or shaded:
0 if sun, 1 if shade
4 categorical indicator for the time of day:
1 if early, 2 if midday, 3 if late
5 metric number of grahami observed
6 metric total number of lizards observed