rhrSchoener: Schoener's ratio

Description Usage Arguments Value Note Author(s) References Examples

Description

Schoener's ratio

Usage

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  rhrSchoener(dat, interval, alpha = 0.25, minM = 10,
    consec = TRUE, meth = 1)

Arguments

dat

data.frame with 3 columns. The first column contains x coordinates, the second column contains y coordinates and the third column contains a timestamp as POSIXct.

interval

numeric value, the interval in seconds.

alpha

numeric value, alpha value used to calculate the critical value.

minM

numeric value, the minimum number of pairs required, if m is smaller than this argument it will return NA.

consec

locagical value, indicates whether or not the observations are consecutive or not.

Value

vector vector of length six.

Note

This implementation uses the normal distribution as a sampling distribution. Relocations are ordered by timestamp and then relocations are sampled based on interval. In cases when relocations are not spaced equally, i.e. no relocation is available exactly at the interval, the relocation directly thereafter is used.

Author(s)

Johannes Signer

References

Swihart, R. and Slade N. 1985, Testing for indpendence of observations in animal movement, _Ecology_, 66(4), 1176 - 1184

Examples

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data(datSH)
dat <- data.frame(datSH[, 2:3], as.numeric(ymd(datSH$day) + hms(datSH$time)))
rhrSchoener(dat, interval=60)

rhr documentation built on May 2, 2019, 6:06 p.m.

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