The paper gave the researcher 15 possible authors of the book, as well as a sample of text written by each. I think that the author analyzed a table with the 15 texts plus the anonymous book in rows, with each cell counting the number of times that word j was found in text i. The true author was found. . Though we can give general indications to guide the researcher at each step, a good dose of subjectivity will always be part of the final result. . . E. Softwares .
Correspondence analysis is made solely with computers.
Suffice is to say that software designer still have a lot to do. A last hint on using SPSS .