copstress: Calculates copstress for given MDS object

In cops: Cluster Optimized Proximity Scaling

Calculates copstress for given MDS object

Description

Calculates copstress for given MDS object

Usage

copstress(
  obj,
  stressweight = 1,
  cordweight = 5,
  q = 1,
  minpts = 2,
  epsilon = 10,
  rang = NULL,
  verbose = 0,
  normed = TRUE,
  scale = c("std", "sd", "proc", "none"),
  init,
  ...
)

Arguments

obj	MDS object (supported are sammon, cmdscale, smacof, rstress, powermds)
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 cordillera; defaults to 1
minpts	the minimum points to make up a cluster in OPTICS; defaults to 2
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 very verbose (copstress level), >3 is extremely (up to MDS optimization level)
normed	should the cordillera be normed; defaults to TRUE
scale	should the configuration be scale adjusted.
init	a reference configuration when doing procrustes adjustment
...	additional arguments to be passed to the cordillera function

Value

A list with the components

• copstress: the weighted loss value

• OC: the Optics cordillera value

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

• cordillera: the cordillera object

cops documentation built on Jan. 22, 2023, 1:47 a.m.