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# CITATION file created with {cffr} R package
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cff-version: 1.2.0
message: 'To cite package "douconca" in publications use:'
type: software
license: GPL-3.0-only
title: 'douconca: Double Constrained Correspondence Analysis for Trait-Environment
  Analysis in Ecology'
version: 1.2.1
doi: 10.32614/CRAN.package.douconca
abstract: Double constrained correspondence analysis (dc-CA) analyzes (multi-)trait
  (multi-)environment ecological data by using the 'vegan' package and native R code.
  Throughout the two step algorithm of ter Braak et al. (2018) is used. This algorithm
  combines and extends community- (sample-) and species-level analyses, i.e. the usual
  community weighted means (CWM)-based regression analysis and the species-level analysis
  of species-niche centroids (SNC)-based regression analysis. The two steps use canonical
  correspondence analysis to regress the abundance data on to the traits and (weighted)
  redundancy analysis to regress the CWM of the orthonormalized traits on to the environmental
  predictors. The function dc_CA() has an option to divide the abundance data of a
  site by the site total, giving equal site weights. This division has the advantage
  that the multivariate analysis corresponds with an unweighted (multi-trait) community-level
  analysis, instead of being weighted. The first step of the algorithm uses vegan::cca().
  The second step uses wrda() but vegan::rda() if the site weights are equal. This
  version has a predict() function. For details see ter Braak et al. 2018 <https://doi.org/10.1007/s10651-017-0395-x>.
authors:
- family-names: Braak
  given-names: Cajo J.F
  name-particle: ter
  email: cajo.terbraak@wur.nl
  orcid: https://orcid.org/0000-0002-0414-8745
- family-names: Rossum
  given-names: Bart-Jan
  name-particle: van
  email: bart-jan.vanrossum@wur.nl
  orcid: https://orcid.org/0000-0002-8673-2514
repository: https://biometris.r-universe.dev
repository-code: https://github.com/Biometris/douconca
commit: 2b71e9f2b6925d2c406e87bc64411dbee32c2420
url: https://github.com/Biometris/douconca
date-released: '2024-09-17'
contact:
- family-names: Rossum
  given-names: Bart-Jan
  name-particle: van
  email: bart-jan.vanrossum@wur.nl
  orcid: https://orcid.org/0000-0002-8673-2514