stability {dse1} | R Documentation

## Calculate Stability of a TSmodel

### Description

Calculate roots and their modulus and indicate stability.

### Usage

        stability(obj, fuzz=1e-4, digits=8, verbose=TRUE)
        ## S3 method for class 'ARMA':
        stability(obj, fuzz=1e-4, digits=8, verbose=TRUE)
        ## S3 method for class 'roots':
        stability(obj, fuzz=1e-4, digits=8, verbose=TRUE)
        ## S3 method for class 'TSmodel':
        stability(obj, fuzz=1e-4, digits=8, verbose=TRUE)
        ## S3 method for class 'TSestModel':
        stability(obj, fuzz=1e-4, digits=8, verbose=TRUE)

### Arguments

`obj` | An object of class TSmodel.
`fuzz` | Roots within fuzz are considered equal.
`digits` | Printing precision.
`verbose` | Print roots and there moduli.

### Value

TRUE or FALSE if the model is stable or not stable.

### See Also

`McMillanDegree`

### Examples

    if(is.R()) data("eg1.DSE.data.diff", package="dse1")
    model <- estVARXls(eg1.DSE.data.diff)
    stability(model)

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