Description Usage Arguments Value References Examples

View source: R/getPercentilePlottingPositions.r

Determination of plotting positions to be used for linear regression of life data analysis is a highly debated topic. This function implements a wide assortment of options for the Weibull-R project.

1 2 | ```
getPercentilePlottingPositions(x, s=NULL, interval=NULL, ppos="beta",
aranks="Johnson", ties="none")
``` |

`x` |
Either a dataframe containing at least |

`s` |
An optional vector of suspension data. |

`interval` |
reserved argument for interval censored data - NOT YET IMPLEMENTED. |

`ppos` |
A string defining a plotting position method. Implemented options include "beta" the incomplete beta function (as default), "Benard", "mean" also known as Herd-Johnson, "Hazen" or modified Kaplan-Meier, "Kaplan-Meier" with modification for final complete failure, and "Blom. |

`aranks` |
A string defining the method for establishing adjusted ranks when suspension data (right censored) are present. Implemented options include "Johnson" (as default) and "KMestimator" |

`ties` |
A string defining a method of eliminating ties, or duplicate time valued data, from plotting. Implemented options include "highest" (used as 'Inspection Option #1' by Abernethy), "mean", "lowest", and "sequential". |

Returns a dataframe with the failure data (as potentially reduced by ties argument), the probability plotting positions, and adjusted ranks.

Robert B. Abernethy, (2008) "The New Weibull Handbook, Fifth Edition"

Leonard C. Johnson (1964) "The Statistical Treatment of Fatigue Experiments"

1 2 3 |

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