Analysis of Ecological Data: Exploratory and Euclidean Methods in Environmental Sciences R package ade4 version 1.7-24 CRAN Task View: Environmetrics (https://CRAN.R-project.org/view=Environmetrics) CRAN Task View: MissingData (https://CRAN.R-project.org/view=MissingData) CRAN Task View: Psychometrics (https://CRAN.R-project.org/view=Psychometrics) CRAN Task View: Spatial (https://CRAN.R-project.org/view=Spatial) Tools for multivariate data analysis. Several methods are provided for the analysis (i.e., ordination) of one-table (e.g., principal component analysis, correspondence analysis), two-table (e.g., coinertia analysis, redundancy analysis), three-table (e.g., RLQ analysis) and K-table (e.g., STATIS, multiple coinertia analysis). The philosophy of the package is described in Dray and Dufour (2007) <doi:10.18637/jss.v022.i04>. Software Depends: R (>= 3.5.0) Imports: graphics, grDevices, methods, stats, utils, MASS, pixmap, sp, Rcpp LinkingTo: Rcpp, RcppArmadillo Suggests: ade4TkGUI, adegraphics, adephylo, adespatial, ape, CircStats, deldir, lattice, spdep, splancs, waveslim, progress, foreach, parallel, doParallel, iterators, knitr, rmarkdown Aurélie Siberchicot <aurelie.siberchicot@univ-lyon1.fr> Comprehensive R Archive Network (CRAN) Stéphane Dray [aut] (ORCID: <https://orcid.org/0000-0003-0153-1105>), Anne-Béatrice Dufour [aut] (ORCID: <https://orcid.org/0000-0002-9339-4293>), Jean Thioulouse [aut] (ORCID: <https://orcid.org/0000-0001-7664-0598>), Daniel Chessel [ant], Thibaut Jombart [ctb], Sandrine Pavoine [ctb], Jean R. Lobry [ctb], Sébastien Ollier [ctb], Daniel Borcard [ctb], Pierre Legendre [ctb], Stéphanie Bougeard [ctb], Aurélie Siberchicot [ctb, cre] (ORCID: <https://orcid.org/0000-0002-7638-8318>) GPL (>= 2) 2026-03-21 application/tgz https://CRAN.R-project.org/package=ade4 doi:10.32614/CRAN.package.ade4