`guerrero.Rd`

Applies Guerrero's (1993) method to select the lambda which minimises the coefficient of variation for subseries of x.

guerrero(x, lower = -1, upper = 2, .period = 2L)

x | A numeric vector. The data used to identify the transformation parameter lambda. |
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lower | The lower bound for lambda. |

upper | The upper bound for lambda. |

.period | The length of each subseries (usually the length of seasonal period). Subseries length must be at least 2. |

A Box Cox transformation parameter (lambda) chosen by Guerrero's method.

Box, G. E. P. and Cox, D. R. (1964) An analysis of transformations. JRSS B 26 211–246.

Guerrero, V.M. (1993) Time-series analysis supported by power transformations. Journal of Forecasting, 12, 37–48.