The placement of anemones on their shells by hermit crabs.
data(CrabShells3)A data frame with 9 rows and 3 columns:
The column where anemone placed;
one of 1 (Side 1), 2 (Central) or 3 (Side 2)
The row where anemone placed;
one of 1 (Side 1), 2 (Central) or 3 (Side 2)
The number of anemones in the indicated sector on the shell
The data provide the number of anemones placed on their shell by hermit crabs in indicated regions. Roughly, the shells are divided into a $3$ x $3$ grid of approximately equal areas.