Sets up the necessary backend for the WN process.
WN(sigma2 = NULL)
double value for the variance, \(\sigma ^2\), of a WN process.
An S3 object with called ts.model with the following structure:
Used in summary: "WN"
Number of Parameters
String containing simplified model
y desc replicated x times
Depth of Parameters e.g. list(1)
Guess Starting values? TRUE or FALSE (e.g. specified value)
In this process, \(Y_t\) is iid from a zero mean normal distribution with variance \(\sigma^2\)