adehabitat (version 1.8.20)

which.ltraj: Identify Relocations Fullfilling a Condition in an Object of Class "ltraj"

Description

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

Usage

which.ltraj(ltraj, expr)

Arguments

ltraj

an object of class ltraj

expr

a character string giving any syntactically correct R logical expression implying the descriptive elements in ltraj

Value

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

See Also

ltraj for additional information about objects of class ltraj

Examples

# NOT RUN {
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),]

# }