Raw File
\title{ Artic lake sediment data }
  Sand, silt, clay compositions of 39 sediment samples at different water depths in an Arctic lake.
  This data set can be found on page 359 of the Aitchison book (see reference).
  A data frame with 39 observations on the following 3 variables.
    \item{\code{sand}}{numeric vector of percentages of sand}
    \item{\code{silt}}{numeric vector of percentages of silt}
    \item{\code{clay}}{numeric vector of percentages of clay}
 The rows sum up to 100, except for rounding errors. The full data set including the water depth can be found in package
 compositions, for example.
Aitchison, J. (1986) \emph{The Statistical Analysis of Compositional
Data} Monographs on Statistics and Applied Probability. Chapman \&
Hall Ltd., London (UK). 416p.
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