Description Usage Arguments Value

COPS versions of Sammon mapping models (via smacofSym)

1 2 3 4 5 |

`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 the lambda argument, the thrid the nu argiument (fixed to -1). Defaults to 1 1 -1. |

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

`weightmat` |
(optional) a matrix of nonnegative weights (NOT the sammon weights) |

`init` |
(optional) initial configuration |

`itmaxi` |
number of iterations. default is 1000. |

`...` |
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 |

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

`scale` |
should the configuration be scale adjusted |

`stresstype` |
which stress to report. Only takes smacofs 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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