[Vegan-commits] r261 - pkg/man
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Mon Mar 17 12:44:05 CET 2008
Author: jarioksa
Date: 2008-03-17 12:44:04 +0100 (Mon, 17 Mar 2008)
New Revision: 261
Modified:
pkg/man/betadisper.Rd
pkg/man/betadiver.Rd
Log:
Doc updates
Modified: pkg/man/betadisper.Rd
===================================================================
--- pkg/man/betadisper.Rd 2008-03-13 13:29:18 UTC (rev 260)
+++ pkg/man/betadisper.Rd 2008-03-17 11:44:04 UTC (rev 261)
@@ -31,7 +31,7 @@
\arguments{
\item{d}{a distance structure such as that returned by
- \code{\link[stats]{dist}}, \code{link{betadiver}} or
+ \code{\link[stats]{dist}}, \code{\link{betadiver}} or
\code{\link{vegdist}}.}
\item{group}{vector describing the group structure, usually a factor
or an object that can be coerced to a factor using
Modified: pkg/man/betadiver.Rd
===================================================================
--- pkg/man/betadiver.Rd 2008-03-13 13:29:18 UTC (rev 260)
+++ pkg/man/betadiver.Rd 2008-03-17 11:44:04 UTC (rev 261)
@@ -45,10 +45,10 @@
denote the number of species shared between two sites as \eqn{a} and
the numbers of unique species (not shared) as \eqn{b} and \eqn{c},
then \eqn{S = a + b + c} and \eqn{\alpha = (2 a + b + c)/2} so that
- \eqn{\beta_w = (b+c)/(2 a + b + c)}. This is the Sorensen
+ \eqn{\beta_w = (b+c)/(2 a + b + c)}. This is the \enc{Sørensen}{Sorensen}
dissimilarity as defined in \pkg{vegan} function
\code{\link{vegdist}} with argument \code{binary = TRUE}. Many
- other indices also are dissimilarity indices.
+ other indices are dissimilarity indices as well.
Function \code{betadiver} finds all indices reviewed by Koleff et
al. (2003). All these indices could be found with function
@@ -58,23 +58,24 @@
functions such as \code{\link{betadisper}}, \code{\link{adonis}} or
\code{\link{mantel}}.
- The indices are directly taken from Table 1 of Koleff et
- al. (2003). The function can be selected either by the index number
- or the subscript name used by Koleff et al. (2003). The numbers,
- names and defining equations can be seen using \code{betadiver(help
- = TRUE)}. In all cases where there are two alternative forms, the
- one with the term \eqn{-1} is used. There are several duplicate
- indices, and the number of distinct alternatives is much lower than
- 24 formally provided. The formulations used in functions differ
- occasionally from those in Koleff et al. (2003), but they are still
- mathematically equivalent. With \code{index = NA}, no index
- is calculated, but instead an object of class \code{betadiver} is
- returned. This is a list of elements \code{a}, \code{b} and
- \code{c}. Function \code{plot} can be used to display the
- proportions of these elements in triangular plot as suggested by
- Koleff et al. (2003), and \code{scores} extracts the triangular
- coordinates. Function \code{plot} returns invisibly the triangular
- coordinates. }
+ The indices are directly taken from Table 1 of Koleff et al. (2003),
+ and they can be selected either by the index number or the subscript
+ name used by Koleff et al. The numbers, names and defining equations
+ can be seen using \code{betadiver(help = TRUE)}. In all cases where
+ there are two alternative forms, the one with the term \eqn{-1} is
+ used. There are several duplicate indices, and the number of distinct
+ alternatives is much lower than 24 formally provided. The formulations
+ used in functions differ occasionally from those in Koleff et
+ al. (2003), but they are still mathematically equivalent. With
+ \code{index = NA}, no index is calculated, but instead an object of
+ class \code{betadiver} is returned. This is a list of elements
+ \code{a}, \code{b} and \code{c}. Function \code{plot} can be used to
+ display the proportions of these elements in triangular plot as
+ suggested by Koleff et al. (2003), and \code{scores} extracts the
+ triangular coordinates or the raw scores. Function \code{plot} returns
+ invisibly the triangular coordinates as an \code{"\link{ordiplot}"}
+ object.
+}
\value{ With \code{index = NA}, the function returns an object of
class \code{"betadisper"} with elements \code{a}, \code{b}, and
@@ -88,7 +89,8 @@
returns a \code{"dist"} object, some indices are similarities and
cannot be used as such in place of dissimilarities, but that is a
severe user error. Functions 10 (\code{"j"}) and 11 (\code{"sor"})
- are two such similarity indices. }
+ are two such similarity indices.
+}
\references{
Koleff, P., Gaston, K.J. and Lennon, J.J. (2003) Measuring beta
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