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

Description Usage Arguments Value Author(s) See Also Examples

View source: R/which.ltraj.r

Description

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

Usage

1

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.

Author(s)

Clement Calenge [email protected]

See Also

ltraj for additional information about objects of class ltraj

Examples

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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),]

adehabitat documentation built on Jan. 28, 2018, 5:02 p.m.