ncfrog: Northern Cricket Frog
Description
In an experiment due to Ferguson et al. (1967) a number of northern
cricket frogs (Acris crepitans) were collected from the mud flats of an
abandoned stream meandering near Indianola, Mississippi, and taken to a test pen
lying to the north west of the collection point. After 30 hours of
enclosure within a dark environmental chamber, 14 of them were released and
the directions taken by these frogs recorded. 0 degrees means North.format
ncfrog is a vector of 14 observations (in degrees).
ncfrog.rad contains the same observations in radians (pi/180).source
Collett, D. (1980)
Outliers in Circular Data
Applied Statistics
29, 1, 50--57.See Also
Ferguson, D.E, Landreth, H.F. and McKeown, J.P. (1967)
Sun compass orientation of the northern cricket frog, Acris crepitans.
Anim. Behav.,
14, 45--53.