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Hello all, I've tried to reproduce the contour plot that appears in the book of Venables and Ripley, at page 255. Is a F-statistic surface and a confidence region for the regression parameters of a non-linear model. It uses the stormer data that are in the MASS package. I haven't been able to reproduce the plot either in R ( version 1.5 ) and S. It makes the axes and it puts the

Dear list! I am interested in learning about MLE and I wonder whether it is possible to use the examples for maximum likelihood estimation given in 8.7 in MASSv3 with R? AFAIU R does not have a direct replacement for S-PLUS's ms() which the examples use for the fitting, but optim() may be of help for me. However, I am not sure how I can convert the use of ms() using optim()--is there an

Hi Folks, I'm probably overlooking some small point, but can't see it. Trying the "Local trend surfaces" example from p.437 of MASS (3rd edn) by V&R, all goes well until the line contour(topo.mar$x, topo.mar$y, topo.lo$fit, levels=seq(700,1000,25), xlab="fi t", ylab="") which produces the response: Error in contour.default(topo.mar$x,

Hye every one, My question will certainly seem stupid as I am quite a beginner in R. I would like to trace a curve which fits these two vectors: x<-c( 2,3,4,5,6,7,8,10 ) y<-c( 20, 12, 8, 6, 5, 4.5, 4, 3.8) It seems to follow a non linear model. Could anyone help me because I could'nt find the answer I am looking for in the FAQs. In advance thank you for your time. G. Lefebvre

Hi, I would like to use the system loader as in scriptaculous.js to load dynamicly some of my javascript files. So I copied and pasted the code from scriptaculous.js into my modules.js (this file should load all my js files from the directory "modules" !). But the problem is when I launch my web page, the scriptaculous.js works correctly but not the modules.js. I think the two methods