Note: These computer programs are old and rarely maintained. They have been usually superceded by our work in The R Language.

Available free software

• Adjusted P-values: Compute various forms of adjustments to a list of probability values in cases of multiple testing.
  Updated on 16/01/02

• Congruence among distance matrices
  Updated on 03/09/07

• DistPCoA: Principal coordinate analysis with correction for negative eigenvalues
  Updated on 08/12/02

• Robinson and Foulds topological distance: Rapidly compute the Robinson and Foulds distance between two additive trees
  
  Updated on 01/08/10

• IndVal: Indicator species, with test of significance

• K-Means: Least-squares partitioning method
  Updated on 01/08/10

• Kendall_W: Species associations through Kendall’s coefficient of concordance
  Updated on 01/08/10

• Pearson correlation coefficient matrix with permutation test
  Updated on 01/08/10

• Biplot guide in French

• NesAnova: Nested Manova by Canonical Analysis
  Updated on 12/08/02

• Optimal Variable Weighting (OVW): Optimal variable weighting for ultrametric and additive tree clustering according to De Soete’s method
  
  Updated on 01/08/10

• ParaFit: Test of host-parasite coevolution
  Updated on 01/08/10

• Permute!: Multiple regression over distance, ultrametric and additive matrices with permutation test
  Updated on 16/03/09

• The R Package for spatial and multidimensional analysis
  Updated on 05/06/04

• The Q Package for spatial and multidimensional analysis
  Updated on 10/11/08

• RdaCca: Redundancy and canonical correspondance analysis
  Updated on 01/08/10

• Polynomial RdaCca: Polynomial and linear version of the RdaCca program.
  Updated on 01/08/10

• Model II regression: Major axis, standard major axis and ordinary least squares
  Updated on 13/11/11

• Multiple linear regression: Compute multiple linear regressions with permutation tests. The program includes regression through the origin.
  Updated on 01/08/10

• SpaceMaker 2: Building spatial variables for trend-surface (polynomials) and all-scale (PCNM) spatial analysis
  Updated on 01/08/10

• T-REX: Tree and Reticulogram Reconstruction <p>

• Modified t-test for a Pearson correlation coefficient corrected for spatial autocorrelation
  Updated on 01/08/10

• Univariate tests of variance homogeneity
  Updated on 01/01/04

• Transformation & Species Scores: Transformations of frequency data suitable for biplots and ordinations
  
  Updated on 17/12/04

• The 4th corner
  Updated on 01/08/10 <p>

Pierre Legendre

• Version française
• English version
• Leçon de clôture

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• Fonctions R / R Functions
• Jeux de données / Datasets
• Tirés-à-part / Reprints

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• Anciens logiciels / Older software

Cours

• Cours en ligne (en anglais): L'écologie numérique en 8 leçons
• Documents d'enseignement
• Recent Advances in Analysis of Multivariate Ecological Data: Theory and Practice