Hello, I am new to R and I have a question about the difference between correspondence analysis in R and SPSS. This is the input table I am working with (4 products and 18 attributes):
> mytable 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 15 11 20 4 14 7 1 2 1 4 12 12 17 19 11 20 9 10 2 19 18 14 14 16 4 14 11 11 15 22 19 22 16 21 19 15 16 3 16 13 10 9 15 4 10 7 11 13 18 17 14 14 16 16 13 11 4 21 18 16 14 20 6 12 14 14 17 23 20 19 18 21 18 19 18 I found the function corresp() in the package MASS, but the results are different from the output in SPSS. Also, I don't understand the coordinates; in the biplot I cannot find a -2 limit for example from the first product on any of the x axes. > Rresult <- corresp(mytable, nf=2) > Rresult First canonical correlation(s): 0.20823373 0.04840434 Row scores: [,1] [,2] 1 -2.0838424 0.01237391 2 0.4901559 1.51190922 3 0.4463375 -0.72631884 4 0.4946202 -0.87620237 Column scores: [,1] [,2] 1 -0.29870621 -0.32282847 2 0.04851042 0.73570925 3 -1.79584803 0.04537505 4 1.10904141 1.21563470 5 -0.35048140 -1.28883782 6 -1.80044987 -1.99532989 7 1.96987033 1.89925225 8 1.59225423 -0.42249233 9 1.96534193 -2.01733348 10 1.29641406 -0.67857429 11 0.33216906 0.05071065 12 0.12620111 -0.30281237 13 -0.59997905 1.90985228 14 -1.18972391 -0.46697874 15 0.34099302 0.55835672 16 -1.07356465 0.44743219 17 0.32569239 -1.21741819 18 0.07133121 0.20777127 Thank you for your patience. am [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.