which.ltraj: Identify Relocations Fullfilling a Condition in an Object of...
In adehabitat: Analysis of Habitat Selection by Animals

Description Usage Arguments Value Author(s) See Also Examples

This function identifies the relocations fullfilling a condition in an object of class ltraj.

1	which.ltraj(ltraj, expr)

`ltraj`	an object of class `ltraj`
`expr`	a character string giving any syntactically correct R logical expression implying the descriptive elements in `ltraj`

A data frame giving the ID, the Bursts and the relocations for which the condition described by expr is verified.

Clement Calenge clement.calenge@oncfs.gouv.fr

ltraj for additional information about objects of class ltraj

data(puechcirc)
puechcirc

## Identifies the relocations for which time lag is
## upper than one hour
which.ltraj(puechcirc, "dt>3600")
puechcirc[burst="CH930824"][[1]][27:28,]


## Identifies the speed between successive
## relocations upper than 0.8 meters/second
which.ltraj(puechcirc, "dist/dt > 0.8")

## This is the case for example for the
## relocations #28, 58, 59 and 60 of "CH930824"
puechcirc[burst="CH930824"][[1]][c(28,58,59,60),]