Claudia, Thomas and William thank you all so much. It's exactly what we needed. Works perfectly.
Rodrigo. -----Mensagem original----- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Em nome de Claudia Beleites Enviada em: quinta-feira, 27 de novembro de 2008 14:01 Para: r-help@r-project.org Assunto: Re: [R] 1-Pearson's R Distance Hi Rodrigo, afaik, (1 - r_Pearson)/2 is used rather than 1 - r_Pearson. This gives a distance measure ranging between 0 and 1 rather than 0 and 2. But after all, dies does not change anything substantial. see e.g. Theodoridis & Koutroumbas: Pattern Recognition. I didn't know of the proxy package, but the calculation it straightforward (though a bit wasteful I suspect: first the whole matrix is produced, and as.dist cuts it down again to a triangular matrix): as.dist (0.5 - cor (t(x) / 2)) Take care wheter you want to use x or t(x). HTH Claudia -- Claudia Beleites Dipartimento dei Materiali e delle Risorse Naturali Università degli Studi di Trieste Via Alfonso Valerio 6/a I-34127 Trieste phone: +39 (0 40) 5 58-34 47 email: [EMAIL PROTECTED] ______________________________________________ R-help@r-project.org 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. ______________________________________________ R-help@r-project.org 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.