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...? many thanks for help ML -- Maurice Libes Tel : +33 (04) 91 82 93 25 Centre d'Oceanologie de Marseille Fax : +33 (04) 91 82 65 48 UMS2196 CNRS- Campus de Luminy, Case 901 mailto:maurice.libes@com.univ-mrs.fr F-13288 Marseille cedex 9 Annuaire : http://annuaire.univmed.fr/showuser.php?uid=libes -- Maurice Libes Tel : +33 (04) 91 82 93 25 Centre d'Oceanologie de Marseille Fax : +33 (04) 91 82 65 48 UMS2196 CNRS- Campus de Luminy, Case 901 mailto:maurice.libes@com.univ-mrs.fr F-13288 Marseille cedex 9 Annuaire : http://annua...

Dear all, I'm trying to estimate some parameters with the optim() function but I need to restrict one parameter and I have not found how to do it. Could you help me please? my program is basically fn<-function(s) initial<-function(r) { cst<-r[1] cst1<-r[2] beta<-r[3] rho<-r[4] p1<-r[5] return(-sum()) } parms<-c() m0<-optim() I need to specify

Hello I'm fairly new to R. I have a script which produces a 1-column vector (numeric). I can write it to a text file using the write command. What I want to do is to run the script a number of times on different input files, producing a different 1-column vector each time and save all the vectors to a text file so that each vector is one separate column in the text file. I had thought of

I'm trying to obtain numerical derivative of a probability computed with mvtnorm with respect to its parameters using grad() and jacobian() from NumDeriv. To simplify the matter, here is an example: PP1 <- function(p){ thetac <- p thetae <- 0.323340333 thetab <- -0.280970036 thetao <- 0.770768082 ssigma <- diag(4) ssigma[1,2] <- 0.229502120