It appears that you are trying to pass a data.frame to the function and it is complaining. You didn't give us enough information to know for sure (e.g. str(predictor) and str(Cfin)), but you could try
mm<-mahal (as.matrix(predictor), as.matrix(Cfin)) ------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Ernesto Villarino Sent: Tuesday, August 6, 2013 5:51 AM To: r-help@r-project.org Subject: Re: [R] problem with mahal function Package dismo Hi all, I want to apply mahal function using data.frame instead of raster data but I am having problems (see error message below). I want to use data.frame since we have seasonal data (the species distribute differently as a function of months). > head (predictor) OCPT x1XM z Pc pHxM MLD 38 21.23519 36.24476 -3164 8.836913 8.082310 68.09159 39 21.13811 36.25013 -2487 8.451318 8.077561 57.78384 40 21.03920 36.25259 -2025 8.132195 8.073292 62.59614 41 20.94312 36.25257 -3409 7.851401 8.069450 55.83329 79 21.22135 36.10911 -40 18.707443 8.108031 42.55479 80 21.14884 36.13638 -2800 21.133693 8.063561 64.28003 > head (Cfin) Lat Long 38 35 -38 39 35 -37 40 35 -36 41 35 -35 79 36 -75 80 36 -74 > mm<-mahal (predictor,Cfin) Error en (function (classes, fdef, mtable) : unable to find an inherited method for function 'mahal' for signature '"data.frame", "data.frame"' Can you help me ?? Thanks, Regards, Ernesto [[alternative HTML version deleted]] ______________________________________________ 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.
