stop_cmdscale {stops} | R Documentation |
STOPS version of strain
Description
The free parameter is lambda for power transformations of the observed proximities.
Usage
stop_cmdscale(
dis,
theta = 1,
type = "ratio",
weightmat = NULL,
ndim = 2,
init = NULL,
...,
stressweight = 1,
structures = c("cclusteredness", "clinearity", "cdependence", "cmanifoldness",
"cassociation", "cnonmonotonicity", "cfunctionality", "ccomplexity", "cfaithfulness",
"cregularity", "chierarchy", "cconvexity", "cstriatedness", "coutlying",
"cskinniness", "csparsity", "cstringiness", "cclumpiness", "cinequality"),
strucweight = rep(1/length(structures), length(structures)),
strucpars,
verbose = 0,
stoptype = c("additive", "multiplicative"),
itmaxi = 1000,
add = TRUE
)
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. |
type |
MDS type. Ignored here. |
weightmat |
(optional) a matrix of nonnegative weights. Not used. |
ndim |
number of dimensions of the target space |
init |
(optional) initial configuration |
... |
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' |
itmaxi |
number of iterations. No effect here. |
add |
if TRUE dis is made to Euclidean disatnces |
Value
A list with the components
stress: the badness-of-fit value (this isn't stress here but 1-(sum_ndim(max(eigenvalues,0))/sum_n(max(eigenvalues,0)), 1-GOF[2])
stress.m: explictly normalized stress (manually calculated)
stoploss: the weighted loss value
indices: the values of the structuredness indices
parameters: the parameters used for fitting (lambda)
fit: the returned object of the fitting procedure, which is cmdscalex object with some extra slots for the parameters and stresses
stopobj: the stopobj object