[Vegan-commits] r1233 - branches/1.17/man
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Wed Jun 16 08:24:16 CEST 2010
Author: gsimpson
Date: 2010-06-16 08:24:15 +0200 (Wed, 16 Jun 2010)
New Revision: 1233
Modified:
branches/1.17/man/adonis.Rd
branches/1.17/man/anosim.Rd
branches/1.17/man/envfit.Rd
branches/1.17/man/mantel.Rd
Log:
links to ?permutations
Modified: branches/1.17/man/adonis.Rd
===================================================================
--- branches/1.17/man/adonis.Rd 2010-06-15 22:13:19 UTC (rev 1232)
+++ branches/1.17/man/adonis.Rd 2010-06-16 06:24:15 UTC (rev 1233)
@@ -93,7 +93,9 @@
intact for a particular hypothesis test where one does not want to
permute the data among particular groups. For instance, \code{strata =
B} causes permutations among levels of \code{A} but retains data within
-levels of \code{B} (no permutation among levels of \code{B}).
+levels of \code{B} (no permutation among levels of \code{B}). See
+\code{\link{permutations}} for additional details on permutation tests
+in Vegan.
The default \code{\link{contrasts}} are different than in \R in
general. Specifically, they use \dQuote{sum} contrasts, sometimes known
Modified: branches/1.17/man/anosim.Rd
===================================================================
--- branches/1.17/man/anosim.Rd 2010-06-15 22:13:19 UTC (rev 1232)
+++ branches/1.17/man/anosim.Rd 2010-06-16 06:24:15 UTC (rev 1233)
@@ -53,7 +53,9 @@
The statistical significance of observed \eqn{R} is assessed by
permuting the grouping vector to obtain the empirical
- distribution of \eqn{R} under null-model.
+ distribution of \eqn{R} under null-model. See
+ \code{\link{permutations}} for additional details on permutation tests
+ in Vegan.
The function has \code{summary} and \code{plot} methods. These both
show valuable information to assess the validity of the method: The
Modified: branches/1.17/man/envfit.Rd
===================================================================
--- branches/1.17/man/envfit.Rd 2010-06-15 22:13:19 UTC (rev 1232)
+++ branches/1.17/man/envfit.Rd 2010-06-16 06:24:15 UTC (rev 1233)
@@ -100,7 +100,9 @@
The goodness of fit statistic is squared correlation coefficient
(\eqn{r^2}).
For factors this is defined as \eqn{r^2 = 1 - ss_w/ss_t}, where
- \eqn{ss_w} and \eqn{ss_t} are within-group and total sums of squares.
+ \eqn{ss_w} and \eqn{ss_t} are within-group and total sums of
+ squares. See \code{\link{permutations}} for additional details on
+ permutation tests in Vegan.
User can supply a vector of prior weights \code{w}. If the ordination
object has weights, these will be used. In practise this means that
Modified: branches/1.17/man/mantel.Rd
===================================================================
--- branches/1.17/man/mantel.Rd 2010-06-15 22:13:19 UTC (rev 1232)
+++ branches/1.17/man/mantel.Rd 2010-06-16 06:24:15 UTC (rev 1233)
@@ -34,7 +34,9 @@
related). However, the significance cannot be directly assessed,
because there are \eqn{N(N-1)/2} entries for just \eqn{N} observations.
Mantel developed asymptotic test, but here we use permutations of
- \eqn{N} rows and columns of dissimilarity matrix.
+ \eqn{N} rows and columns of dissimilarity matrix. See
+ \code{\link{permutations}} for additional details on permutation tests
+ in Vegan.
Partial Mantel statistic uses partial correlation
conditioned on the third matrix. Only the first matrix is permuted so
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