[Vegan-commits] r2309 - pkg/vegan/man
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Sun Sep 30 08:28:38 CEST 2012
Author: jarioksa
Date: 2012-09-30 08:28:38 +0200 (Sun, 30 Sep 2012)
New Revision: 2309
Modified:
pkg/vegan/man/anova.cca.Rd
Log:
rename CAP to dbRDA and typesetting issues
Modified: pkg/vegan/man/anova.cca.Rd
===================================================================
--- pkg/vegan/man/anova.cca.Rd 2012-09-29 07:02:20 UTC (rev 2308)
+++ pkg/vegan/man/anova.cca.Rd 2012-09-30 06:28:38 UTC (rev 2309)
@@ -15,7 +15,7 @@
The function performs an ANOVA like permutation test for Constrained
Correspondence Analysis (\code{\link{cca}}), Redundancy Analysis
(\code{\link{rda}}) or distance-based Redundancy Analysis
- (\code{\link{capscale}}) to assess the significance of constraints.
+ (dbRDA, \code{\link{capscale}}) to assess the significance of constraints.
}
\usage{
\method{anova}{cca}(object, alpha=0.05, beta=0.01, step=100, perm.max=9999,
@@ -113,18 +113,18 @@
fixed number of permutations will be used, and this is given by
argument \code{permutations}, or if this is missing, by \code{step}.
- Community data are permuted with choice \code{model = "direct"},
- residuals after partial CCA/RDA/CAP with choice \code{model = "reduced"}
- (default), and residuals after CCA/RDA/CAP under choice
- \code{model = "full"}. If there is no partial CCA/RDA/CAP stage,
- \code{model = "reduced"} simply permutes the data and is equivalent to
- \code{model = "direct"}. The test statistic is ``pseudo-\eqn{F}'',
+ Community data are permuted with choice \code{model="direct"},
+ residuals after partial CCA/ RDA/ dbRDA with choice \code{model="reduced"}
+ (default), and residuals after CCA/ RDA/ dbRDA under choice
+ \code{model="full"}. If there is no partial CCA/ RDA/ dbRDA stage,
+ \code{model="reduced"} simply permutes the data and is equivalent to
+ \code{model="direct"}. The test statistic is \dQuote{pseudo-\eqn{F}},
which is the ratio of constrained and unconstrained total Inertia
(Chi-squares, variances or something similar), each divided by their
respective ranks. If there are no conditions (\dQuote{partial}
terms), the sum of all eigenvalues remains constant, so that
pseudo-\eqn{F} and eigenvalues would give equal results. In partial
- CCA/RDA/CAP, the effect of conditioning variables
+ CCA/ RDA/ dbRDA, the effect of conditioning variables
(\dQuote{covariables}) is removed before permutation, and these
residuals are added to the non-permuted fitted values of partial CCA
(fitted values of \code{X ~ Z}). Consequently, the total Chi-square
More information about the Vegan-commits
mailing list