slopediff: Compare Slopes of Mantel Regression Within and Across Blocks

In jarioksa/natto: An Extreme 'vegan' Package of Experimental Code

Compare Slopes of Mantel Regression Within and Across Blocks

Description

Functions fit linear regression on distances within blocks and across blocks and compere their slopes using permutation tests.

Usage

slopediff(ydist, xdist, block, nperm = 999)

slopediff2(ydist, xdist, block, nperm = 999)

## S3 method for class 'slopediff'
plot(x, col = 1, obsline = TRUE, ...)

## S3 method for class 'slopediff'
summary(object, ...)

Arguments

ydist, xdist	Dependent and indpendent dissimilarities.
block	Blocking of sites.
nperm	Number of simple permutations.
x	Result output from slopediff or slopediff2.
col	Plotting colour.
obsline	Draw line on observed statistic in the density plot.
...	Other parameters passed to plot.
object	Result object from slopediff or slopediff2.

Details

Functions are intended to analyse the differences of linear Mantel regression within and across blocks. Typically the dependent dissimilarities (ydist) are based on community data, independent dissimilarities (xdist) are based on environmental data, and block defines subsets of data, such as geographical subareas.

Functions slopediff and slopediff2 differ in their permutation models. Function slopediff permutes the classification vector defining blocks, and keeps the dependent (ydist) and independent (xdist) pairs of dissimilarities fixed. Function slopediff2 permutes dependent data, and keeps blocks and dependent distances fixed.

Author(s)

Jari Oksanen

jarioksa/natto documentation built on March 28, 2024, 12:45 a.m.