Correspondence analysis (Multi variate analysis)
Currently I am planning to learn correspondence analysis (CA) for my research work. Can anybody teach me how to perform CA and mainly how to interpret the data from the CA plot. It would be really great help for me if could send me either a link which clearly explains the concepts or if your expert please do teach me.
Thanks in advance
Cheers,
Ram
You can opt for XLStat software for PCA and MCA. Here is a list of some books which may help you,
1) Multiple Correspondence Analysis and Related Methods by Michael Greenacre, Jorg Blasius. Taylor & Francis. 2006
2) Correspondence Analysis in Practice by Michael Greenacre. Taylor & Francis. 2007
3) Applied Correspondence Analysis: An Introduction
By Sten Erik Clausen. SAGE Publication
4) Greenacre, Michael (1983). Theory and Applications of Correspondence Analysis. London: Academic Press.
Thanks Mr.Kaushik Bhattacharjee. I try to get access to these books.
Thanks for Mr. NarendraKumar for the reply. I tried using CodonW. But I am not clear , how to intepret the results from it. Can you please do me a favour? I can send my output file from CodonW. You can explain me how to figure out the things in it. So that I can schedule a time and call you on that time.
I used SAS package to conduct the CA before, but there was some memory problem when I calculate large amount of data. These days, I use R-package.
@ Ramanandan:
here is tutor guide for codon W.
http://codonw.sourceforge.net/index.html
ENJOY
Thanks Insung Ahn..sure I will try it out in R language.Thanks Narendra.
Have u tried R? It is free, robust & versatile. And you will easily find packages for doing CA.
Hi. Just an update to this discussion.
As far as commercial softwares are concerned, I like XLStat (http://www.xlstat.com/en/) which comes an an Excel add-in. Its CA module is interesting, with many advanced option (e.g., analysis of symmetric tables, supplementary points, etc).
A free Excel add-in, made by Prof Madsen (archaeologist) can be found at this link: http://www.archaeoinfo.dk/
As for R, there are many packages out there. I happen to use the 'ca' package, and 'FactoMineR'. Both have good helping documentation, and the latter has also YouTube video tutorial made from Prof. Husson himself .
I have written an R script to perform CA in R, which also provide the facility to perform rows and columns clustering, and to test for the significance of the dimensions. The script is described in an article of mine (available here on ResearchGate) and also from the site http://cainarchaeology.weebly.com/ , from which it can be freely downloaded.
Hope this helps
Gianmarco Alberti
Keith Kintigh ´s TFQA page explains Correspondence Analysis for archaeology using Systat (there is a free Systat version for Students, called "Mystat"). PAST (Paleontological statistics software) also has a CA module that may be easier to use.
Just a quick update:
I have build an R package which provides a visual aid to Correspondence Analysis interpretation. Further, it implements some permutation methods to test for the significance of the total inertia and of selected CA dimensions.
A description of the package and a guide on how to download and install it in R can be found at this web address:
http://cainarchaeology.weebly.com/cainterprtools-r-package.html
Best
Gm A
http://cainarchaeology.weebly.com/cainterprtools-r-package.html
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