search for: duleg

I have a question about the function "duleg" in the package "labdsv". How the p-value is calculated ? Dufrene and Legendre (1997) have shown two calculation way ; one is the difference between the observed value and the mean of those obtained from random permutations and another is the rank of the observed value in the randoml...

Hi, I'd like to perform Dufrene-Legendre Indicator Species Analysis for a multivariate regression tree. However I have problems with arguments of duleg(veg,class,numitr=1000)function. How to obtain a vector of numeric class memberships for samples, or a classification object returned from mvpart? thanks in advance -- Best regards, Agnieszka Strzelczak mailto:astrzelczak at ps.pl

Hi, I'm trying to find out what threshold of indicator value in labadsv should be used to accept a specie as an indicator one? So far I assumed that indval=0.5 is high enough to avoid any mistakes but it was based only in my intuition. I'd be greatful for any advise best regards Agnieszka

...ion is clearly wrong. I tested it on linux (because I don't have a PC), and I get the same (incorrect) behavior as the PC. Simply by inserting debug WRITE statements in the FORTRAN I would get different, and correct, results, so I assumed it was an optimization error. So, 1) R CMD SHLIB duleg.f does not work, and produces bogus code however, 2) gfortran -c alt_duleg.f gcc -O -std=gnu99 -shared -L/usr/local/lib -o alt_duleg.so alt_duleg.o -lgfortran -lm -lgcc_s does work (note the -O low optimization). Otherwise the gcc command is identical to the one produced by R C...

Hello guys I am new to this list and for R too. I am wondering if there is a patch for the SPSS reading code on the foreign package, in order to be able to read long variable names. Right now read.spss() just trunc the names to 8 characters. Or if someone could help me on other way: I have to process everyday a lot of SPSS Syntax Files and Dat files that come from one system that can only export