glm
Just as a matter of interest, how did this strange form for the LHS of binomial glms evolve? When my students ask I usually mutter something about a smooth generalization to the multinomial case, but I've no idea if this was really the motivation for doing things this way. Murray Jorgensen
At 11:42 AM 20-12-00 -0500, Robert Gentleman wrote:
On Wed, Dec 20, 2000 at 05:01:44PM +0100, Oscar wrote:
It was my fault, as you have seen. Y matrix must contain successes and
failures, and not successes and trials.
Sorry for my ignorance and thanks a lot for your help. Oscar
This is a very good argument for a more sophisticated modeling paradigm where the lefthand side must be a Binomial object. Filling this up correctly is often easier and more straight forward than trying to figure out what is wanted at fit time. -- +---------------------------------------------------------------------------+ | Robert Gentleman phone : (617) 632-5250 | | Associate Professor fax: (617) 632-2444 | | Department of Biostatistics office: not yet | | Harvard School of Public Health email: rgentlem at jimmy.dfci.harvard.edu | +---------------------------------------------------------------------------+ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
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Murray Jorgensen, Department of Statistics, University of Waikato, Hamilton, New Zealand. [maj at waikato.ac.nz] http://www.stats.waikato.ac.nz/Staff/maj.html_ "These data do not support the hypothesis" Well . . . The first one does, but the second and third don't, now the fourth . . . [ In which I pose the question: is "data" really plural. ] -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._