[Vegan-commits] r2559 - pkg/vegan/man
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Thu Jul 11 13:39:10 CEST 2013
Author: jarioksa
Date: 2013-07-11 13:39:10 +0200 (Thu, 11 Jul 2013)
New Revision: 2559
Modified:
pkg/vegan/man/dispweight.Rd
Log:
fix dispweight man page: gave WARNING
Modified: pkg/vegan/man/dispweight.Rd
===================================================================
--- pkg/vegan/man/dispweight.Rd 2013-07-11 11:28:13 UTC (rev 2558)
+++ pkg/vegan/man/dispweight.Rd 2013-07-11 11:39:10 UTC (rev 2559)
@@ -1,11 +1,11 @@
\encoding{UTF-8}
-\name{disp_weight}
-\alias{disp_weight}
+\name{dispweight}
+\alias{dispweight}
\title{Dispersion-based weighting of species counts}
\description{Transform abundance data using dispersion-based weighting of species counts}
-\usage{disp_weight(comm, group, nperm = 1000)}
+\usage{dispweight(comm, group, nperm = 1000)}
\arguments{
\item{comm}{Community data matrix.}
@@ -17,20 +17,20 @@
Dispersion weighting can be used when there are \emph{a priori} defined groups
(eg. lacation of samples).
-The dispersion index (D) is calculated as ratio between
+The dispersion index (\eqn{D}) is calculated as ratio between
variance and mean and averaged across groups. D can then be used as divisor to
downweight species abundances.
However species should be only downweighted, when there is evidence for
-over-dispersion (D > 1). This is tested using a permutational Chi-squared test.
+over-dispersion (\eqn{D > 1}). This is tested using a permutational Chi-squared test.
If this test shows statistically significant over-dispersion then the species is
-downweighted by 1/D, else the divisor is 1.
+downweighted by \eqn{1/D}, else the divisor is \eqn{1}.
}
\value{
A list of class \code{dispweight} with the following items:
\item{D}{Average Dispersion index.}
- \item{p}{p-value of permutation test that D = 1.}
+ \item{p}{\eqn{p}-value of permutation test that \eqn{D = 1}.}
\item{weights}{weights applied to community data.}
\item{transformed}{transformed community data.}
}
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