METHOD OF DECOMPOSITION IN FACTOMINER FOR CA

[DANIEL LOPEZ ROCHE]

Hello:

Firstly I want to thank you the great package you've developped. I would like to know what is the method of decomposition in R for Correspondence Analysis? Is it singular value decomposition? Is it possible to employ other methods?

Thanks a lot,

Daniel.

[Francois Husson]

Yes singular value decomposition is used, but on a specific matrix, not directrly on theraw data.
See th code of the CA function if you want or any book on correspondance analysis.
Or you can watch these videos on CA:

1. Introduction
2. Visualizing the row and column clouds
3. Inertia and percentage of inertia
4. Simultaneous representation
5. Interpretation aids

FH

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	François Husson Department Statistics & Computer science UMR 6625 IRMAR CNRS 65 rue de Saint-Brieuc, CS 84215, 35042 Rennes Cedex Tel: +33 2 23 48 58 86 https://husson.github.io
En 2022, Agrocampus Ouest devient l'Institut Agro Rennes-Angers.