Package 'fpc' - open source solution for an Internet free, intelligent ...
Package 'fpc' - open source solution for an Internet free, intelligent ...
Package 'fpc' - open source solution for an Internet free, intelligent ...
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6 adcoord<br />
Usage<br />
adcoord(xd, clvecd, clnum=1)<br />
Arguments<br />
xd<br />
clvecd<br />
clnum<br />
the data matrix; a numerical object which c<strong>an</strong> be coerced to a matrix.<br />
integer vector of class numbers; length must equal nrow(xd).<br />
integer. Number of the homogeneous class.<br />
Details<br />
Value<br />
The square root of the homogeneous classes covari<strong>an</strong>ce matrix is inverted by use of tdecomp, which<br />
c<strong>an</strong> be expected to give reasonable results <strong>for</strong> singular within-class covari<strong>an</strong>ce matrices.<br />
List with the following components<br />
ev<br />
units<br />
proj<br />
eigenvalues in descending order.<br />
columns are coordinates of projection basis vectors. New points x c<strong>an</strong> be projected<br />
onto the projection basis vectors by x %*% units<br />
projections of xd onto units.<br />
Author(s)<br />
Christi<strong>an</strong> Hennig http://www.homepages.ucl.ac.uk/~ucakche/<br />
References<br />
Hennig, C. (2004) Asymmetric linear dimension reduction <strong>for</strong> classification. Journal of Computational<br />
<strong>an</strong>d Graphical Statistics 13, 930-945 .<br />
Hennig, C. (2005) A method <strong>for</strong> visual cluster validation. In: Weihs, C. <strong>an</strong>d Gaul, W. (eds.):<br />
Classification - The Ubiquitous Challenge. Springer, Heidelberg 2005, 153-160.<br />
See Also<br />
plotcluster <strong>for</strong> straight <strong>for</strong>ward discrimin<strong>an</strong>t plots. discrproj <strong>for</strong> alternatives. rFace <strong>for</strong> generation<br />
of the example data used below.<br />
Examples<br />
set.seed(4634)<br />
face