# Converts AR/MA coefficients from operator space to the PACF space

### Description

Converts AR/MA coefficients from operator space to the PACF box-space; usually for internal use

### Usage

1 | ```
ARToPacf(phi)
``` |

### Arguments

`phi` |
The AR/MA coefficients in operator space |

### Value

The AR/MA coefficients in the PACF space

### Author(s)

A. I. McLeod

### References

Barndorff-Nielsen O. E., Schou G. (1973). "On the parametrization of autoregressive models by partial autocorrelations." Journal of Multivariate Analysis, 3, 408-419

McLeod A. I., Zhang Y (2006). "Partial autocorrelation parameterization for subset autore- gression." Journal of Time Series Analysis, 27(4), 599-612

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