Extract.ltraj {adehabitat} | R Documentation

## Extract or Replace Parts of an Object of Class ltraj

### Description

Extract or replace subsets of objects of class `ltraj`.

### Usage

      x[i, id, burst]
      x[i, id, burst] <- value

### Arguments

`x` | an object of class `ltraj`
`i` | the elements to extract or replace. `i` is `numeric`
`id` | a vector indicating the identity of the animals to extract or replace
`burst` | a vector indicating the identity of the bursts of relocations to extract or replace
`value` | an object of class `ltraj`

### Details

Objects of class `ltraj` contain several bursts of relocations. This function subsets or replaces these bursts, based on their indices or on the attributes `id` and `burst`.

### Value

An object of class `ltraj`.

### Author(s)

Clément Calenge calenge@biomserv.univ-lyon1.fr

### See Also

`as.ltraj`, `gdltraj`

### Examples

      data(puechcirc)
      puechcirc

      ## Extract the second and third bursts
      (toto <- puechcirc[2:3])

      ## Extracts all bursts collected on the animal JE
      puechcirc[id = "JE93"]

      ## Replace one burst
      (toto[2] <- puechcirc[1:2])

[Package adehabitat version 1.4 Index]