ncfrog: Northern Cricket Frog

In circular: Circular Statistics

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.

Usage

data(ncfrog)

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.

circular documentation built on May 2, 2019, 4:42 p.m.