supplementary variables in FactoMineR versus envfit in vegan

[Jean-Luc Dupouey]

Dear forumites,

Are the supplementary variables in FactoMineR PCA supposed to be located at the same position along the principal components as the environmental variables positioned with rda+envfit in vegan? I tried and didn't get the same coordinates, and I wonder why. Thanks in advance,

Jean-Luc

[Francois HUSSON]

Hi,

I don't know the package vegan, but maybe the variables are not standardized in vegan, whereas there are in FactoMineR. If you want to have unstandardized variables, use scale.unit=FALSE in the PCA function.

FH

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De: "Jean-Luc Dupouey" <jldu...@wanadoo.fr>
À: "FactoMineR users" <factomin...@googlegroups.com>
Envoyé: Lundi 17 Juillet 2023 13:16:22
Objet: [SOCIAL]supplementary variables in FactoMineR versus envfit in vegan

Dear forumites,

Are the supplementary variables in FactoMineR PCA supposed to be located at the same position along the principal components as the environmental variables positioned with rda+envfit in vegan? I tried and didn't get the same coordinates, and I wonder why. Thanks in advance,

Jean-Luc

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