Description Usage Arguments Value Examples

The name “folded Power Transformation” is used because this does for power transformations what Tukey's folded logarithm does for the logarithmic tranformation. The function calculates

*f(p, λ, ε) = \frac{p+ε}{1-p+ε}^λ*

where *λ* is the power and *ε* is a positive
offset that ensures that *\frac{p+ε}{1-p+ε}* is
greater than 0 and finite.

1 | ```
fpower(p, lambda, eps)
``` |

`p` |
Mortality proportion |

`lambda` |
Power |

`eps` |
If |

The transformed values of `fpower(p)`

.

1 2 | ```
p <- (0:10)/10
ytrans <- fpower(p, lambda=0.25, eps=1/450)
``` |

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