stop_sammon: STOPS version of Sammon mapping
In stops: Structure Optimized Proximity Scaling

stop_sammon

R Documentation

STOPS version of Sammon mapping

Description

Uses smacofx::sammon. The free parameter is lambda for power transformations of the observed proximities.

Usage

stop_sammon(
  dis,
  theta = 1,
  type = "ratio",
  ndim = 2,
  init = NULL,
  weightmat = NULL,
  itmaxi = 1000,
  acc = 1e-08,
  ...,
  stressweight = 1,
  structures = c("cclusteredness", "clinearity", "cdependence", "cmanifoldness",
    "cassociation", "cnonmonotonicity", "cfunctionality", "ccomplexity", "cfaithfulness",
    "chierarchy", "cconvexity", "cstriatedness", "coutlying", "cskinniness", "csparsity",
    "cstringiness", "cclumpiness", "cinequality"),
  strucweight = rep(1/length(structures), length(structures)),
  strucpars,
  verbose = 0,
  stoptype = c("additive", "multiplicative"),
  registry = struc_reg
)

Arguments

`dis`	numeric matrix or dist object of a matrix of proximities
`theta`	the theta vector of powers; this must be a scalar of the lambda transformation for the observed proximities. Defaults to 1.
`type`	MDS type. Ignored here.
`ndim`	number of dimensions of the target space
`init`	(optional) initial configuration
`weightmat`	a matrix of nonnegative weights. Has no effect here.
`itmaxi`	maximum number of iterations
`acc`	accuracy
`...`	additional arguments to be passed to the fitting procedure
`stressweight`	weight to be used for the fit measure; defaults to 1
`structures`	which structuredness indices to be included in the loss
`strucweight`	weight to be used for the structuredness indices; ; defaults to 1/#number of structures
`strucpars`	the parameters for the structuredness indices
`verbose`	numeric value hat prints information on the fitting process; >2 is extremely verbose
`stoptype`	How to construct the target function for the multi objective optimization? Either 'additive' (default) or 'multiplicative'
`registry`	registry object with c-structuredness indices.