Extract.ltraj {adehabitatLT}

Extract or Replace Parts of an Object of Class ltraj

Description

Extract or replace subsets of objects of class ltraj.

Usage

  ## S3 method for class 'ltraj'
x[i, id, burst]
  ## S3 replacement method for class 'ltraj'
x[i, id, burst] <- value

Arguments

x

an object of class ltraj

i

numeric. The elements to extract or replace

id

a character vector indicating the identity of the animals to extract or replace

burst

a character 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 *or* burst.

When replacement is done, it is required that value and x have the same variables in attribute infolocs (i.e., both contain the same variables or both do not contain any variable, see the help page of as.ltraj)

Value

An object of class ltraj.

Author(s)

Clement Calenge [e-mail]

See Also

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]
  toto