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Hello! I am trying to read Ferret index files from Windows machine on my Mac G5 Leopard machine, but the following returns nil: Ferret::Index::IndexReader.new( index_paths ) Should this work? Are index files guaranteed to be platform independent or not? Is there any problem if files (top direectory) are renamed? izidor P.S. I can create the index myself and then everything works.

...numeric values for the dependent variable. I can construct the relevant vectors by hand, if I have to (and I guess I will start in that direction) but I am sure there must be 1-3 line bit of R that could elegantly create the factor and the vector of values. Thanks in advance, -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

...gs up so that a post to the Google Group goes to the r-help mailing list, and vice-versa. Also, does anyone know why the three existing R Google Groups failed to get connected to r-help? It might require some action on the part of the r-help list administrator. Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

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...orresponding values from a.vals. I think I can probably write a loop to construct of a vector of ratings of the same length as a.id so that the ratings match the ID, and then go from there. Is there a better way? Perhaps using factors or levels or something? Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

Is there a download page for mongrel_cluster? I see that "gem install mongrel_cluster" works, but I can''t see where it''s coming from. Usually gems have some sort of project page somewhere. -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

...#39;'s parsed query structure, and deleting stop words before it tries to use it? I would like to avoid parsing the query myself, because that duplicates what ferret does. (At the very least, I would like to avoid writing a ferret query language parser!) Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

...l plots of my data using qqplot, and now I would like to fit a line to the points on the plot and check the correlation coefficient to have a more objective measure of how straight the line is. Is there a simple way of doing that? (I'm still pretty new to R.) Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

...in x and response values in y. How do you plot together both the points (x,y) and the curve that results from the fitted model, if the model is not y ~ x, but a higher order polynomial, e.g. y~poly(x,2)? (In other words, abline doesn't work for this case.) Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

...textbook tells me). So, two questions: 1) Is there a function ready to use for calculating the Brown-Forsythe F*? 2) If not, what do people use for checking the results of a (one-way) ANOVA when there is non-normality as well as non-constant variances? Thanks, --Paul -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

....6.2-win32.exe Could someone check and confirm that the MD5 sums on the CRAN server are incorrect? (And fix it?) Thanks, --Paul p.s. Given that two CRAN servers have the bad value, I'm guessing it's safe to install. It installed okay is seems to be running fine. -- Paul Lynch Aquilent, Inc. National Library of Medicine (Contractor)

Hi, everybody, 3 questions about R-square: ---------(1)----------- Does R2 always increase as variables are added? ---------(2)----------- Does R2 always greater than 1? ---------(3)----------- How is R2 in summary(lm(y~x-1))$r.squared calculated? It is different from (r.square=sum((y.hat-mean (y))^2)/sum((y-mean(y))^2)) I will illustrate these problems by the following codes: