Revision 62ec4279da693bf1ea3ff1a45af91e5877ff3715 authored by Matthias Templ on 20 January 2009, 20:49:02 UTC, committed by cran-robot on 20 January 2009, 20:49:02 UTC
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robCompositions-package.Rd
\name{robCompositions-package}
\alias{robCompositions-package}
\alias{robCompositions}
\docType{package}
\title{
Robust Estimation for Compositional Data.
}
\description{
This first version of the package includes advanced methods for
imputation of compositional data including robust methods. The
package will be enhanced with other multivariate methods for
compositional data in near future.
}
\details{
\tabular{ll}{
Package: \tab robCompositions\cr
Type: \tab Package\cr
Version: \tab 1.0\cr
Date: \tab 2008-12-15\cr
License: \tab GPL 2\cr
LazyLoad: \tab yes\cr
}
}
\author{
Peter Filzmoser, Karel Hron, Matthias Templ
Maintainer: Matthias Templ <templ@tuwien.ac.at>
}
\references{
Aitchison, J. (1986) \emph{The Statistical Analysis of Compositional
Data} Monographs on Statistics and Applied Probability. Chapman \&
Hall Ltd., London (UK). 416p. \\
Hron, K. and Templ, M. and Filzmoser, P. (2008) Imputation of missing values for compositional data using classical and robust methods
\emph{Research Report SM-2008-4, Vienna University of Technology}, 15 pages.
}
\keyword{ package }
\seealso{
\code{\link[<compositions>:<compositions>-package]{<compositions>}}
}
\examples{
## k nearest neighbor imputation
data(aitchison395)
aitchison395[1,3]
aitchison395[1,3] <- NA
impKNNa(aitchison395)$xImp[1,3]
## iterative model based imputation
data(aitchison395)
x <- aitchison395
x[1,3]
x[1,3] <- NA
xi <- impCoda(x)$xImp
xi[1,3]
s1 <- sum(x[1,-3])
impS <- sum(xi[1,-3])
xi[,3] * s1/impS
xi <- impKNNa(aitchison395)
xi
summary(xi)
plot(xi, which=1)
plot(xi, which=2)
plot(xi, which=3)
}
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