Description Usage Arguments Value

PCOPS version of strain

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |

`dis` |
numeric matrix or dist object of a matrix of proximities |

`theta` |
the theta vector of powers; this is either a scalar of the lambda transformation for the observed proximities, or a vector where the first is the kappa argument for the fitted distances (here internally fixed to 1) and the second and third the lambda and the nu argument (the latter is fixed to 1). Defaults to 1 1 1 |

`weightmat` |
(optional) a matrix of nonnegative weights |

`ndim` |
number of dimensions of the target space |

`init` |
(optional) initial configuration |

`itmaxi` |
number of iterations. No effect here. |

`...` |
additional arguments to be passed to the fitting procedure |

`stressweight` |
weight to be used for the fit measure; defaults to 1 |

`cordweight` |
weight to be used for the cordillera; defaults to 0.5 |

`q` |
the norm of the corrdillera; defaults to 1 |

`minpts` |
the minimum points to make up a cluster in OPTICS; defaults to ndim+1 |

`epsilon` |
the epsilon parameter of OPTICS, the neighbourhood that is checked; defaults to 10 |

`rang` |
range of the distances (min distance minus max distance). If NULL (default) the cordillera will be normed to each configuration's maximum distance, so an absolute value of goodness-of-clusteredness. |

`verbose` |
numeric value hat prints information on the fitting process; >2 is extremely verbose |

`scale` |
should the configuration be scale adjusted |

`normed` |
should the cordillera be normed; defaults to TRUE |

`stresstype` |
which stress to report. Only takes cmdscales default stress currrently. |

A list with the components

stress: the stress

stress.m: default normalized stress

copstress: the weighted loss value

OC: the Optics cordillera value

parameters: the parameters used for fitting (kappa, lambda)

fit: the returned object of the fitting procedure

cordillera: the cordillera object

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