# hist.ltraj: Histogram of the Descriptive Parameters of a Trajectory In adehabitatLT: Analysis of Animal Movements

 hist.ltraj R Documentation

## Histogram of the Descriptive Parameters of a Trajectory

### Description

This function draws an histogram of any tranformation of the descriptive parameters of a trajectory in objects of class `ltraj`.

### Usage

``````## S3 method for class 'ltraj'
hist(x, which = "dx/sqrt(dt)", ...)
``````

### Arguments

 `x` an object of class `ltraj` `which` a character string giving any syntactically correct R expression implying the descriptive elements in `x`, or the variables in the optional attribute `infolocs` . `...` parameters to be passed to the generic function `hist`.

### Value

a list of objects of class `"histogram"`

### Author(s)

Clement Calenge clement.calenge@ofb.gouv.fr

`hist`, `ltraj` for additional information on the descriptive parameters of the trajectory, `qqnorm.ltraj` for examination of distribution.

### Examples

``````
## Simulation of a Brownian Motion
a <- simm.brown(c(1:300, seq(301,6000,by=20)))

## dx/sqrt(dt) and dy/sqrt(dt) are normally distributed (see
## ?qqchi)
hist(a, "dx/sqrt(dt)", freq = FALSE)
lines(tutu <- seq(-5,5, length=50), dnorm(tutu), col="red")

hist(a, "dy/sqrt(dt)", freq = FALSE)
lines(tutu, dnorm(tutu), col="red")

## Look at the distribution of distances between
## successive relocations
hist(a, "dist/sqrt(dt)", freq = FALSE)
lines(tutu <- seq(0,5, length=50), dchi(tutu), col="red")
``````

adehabitatLT documentation built on Sept. 11, 2024, 7:15 p.m.