data(frogs)
Dataset frogs.matrix
is a 9-by-9 matrix with rows and columns
corresponding to 9 stimuli presented to a female frog. Entry
$(i,j)$ corresponds to the number of times the frog preferred
stimulus $i$.
Dataset frogs
is a 36-by-9 matrix with each row corresponding
to a pair of distinct stimuli [$36=9*(9-1)/2$]; if a row has
non-NA
columns $i$ and $j$, the its entries show the
number of times the frog preferred stimulus $i$ or stimulus
$j$.
The first form may be converted to the second using function
as.pairwise()
. Note that the square matrix may have NA
entries off the main diagonal (some pairs did not meet).
See purum.Rd
for another mating preference dataset.
purum
data(frogs)
frogs.matrix
Run the code above in your browser using DataCamp Workspace