which.ltraj {adehabitatLT} | R Documentation |
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 |
expr |
a character string giving any syntactically correct R
logical expression implying the descriptive elements in
|
Value
A data frame giving the ID, the Bursts and the relocations for which
the condition described by expr
is verified.
Author(s)
Clement Calenge clement.calenge@ofb.gouv.fr
See Also
ltraj
for additional information about objects
of class ltraj
Examples
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),]
[Package adehabitatLT version 0.3.27 Index]