Hi all, Let x and y be two real predictor variables and z the real variable reponse such that z=f(x,y)+e. Could you give some methods to estimate f and the R packages if there are available. f is unknown and i would be interested by kernel regression methods or methods based on projection to estimate it. In the one dimension case, my problem can be solved with the function lowess. So, what should be the solution(s) in two dimensions ? Thanks, Olivier -- -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- Olivier MARTIN phone: (33) 04 76 61 53 55 Projet IS2 06 08 67 93 42 INRIA Rhone-Alpes fax : (33) 04 76 61 54 77 655, Av. de l'Europe Montbonnot e-mail:olivier.martin at inrialpes.fr 38334 Saint Ismier cedex -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- -------------- next part -------------- An HTML attachment was scrubbed... URL: https://stat.ethz.ch/pipermail/r-help/attachments/20010712/65c913b9/attachment.html