Sets up the necessary backend for the WN process.

WN(sigma2 = NULL)

## Arguments

sigma2

A double value for the variance, $$\sigma ^2$$, of a WN process.

## Value

An S3 object with called ts.model with the following structure:

process.desc

Used in summary: "WN"

theta

$$\sigma$$

plength

Number of Parameters

print

String containing simplified model

desc

y desc replicated x times

obj.desc

Depth of Parameters e.g. list(1)

starting

Guess Starting values? TRUE or FALSE (e.g. specified value)

## Note

In this process, $$Y_t$$ is iid from a zero mean normal distribution with variance $$\sigma^2$$

James Balamuta

## Examples

WN()
WN(sigma2=3.4)