search for: do_nlm

...available, are always present no matter where they get passed. Is that not correct? Optim give the same results. Is it possible to "get" nlm/optim to preserve the names without modifying the C code? I started looking at the R and C code to examine where to change this and found the SEXP do_nlm(SEXP call, SEXP op, SEXP args, SEXP rho) function, but I'm not really sure how to modifiy yet to preserve the variable names, if there are variable names when it gets to that function. Plus I'd have to install lots of new and potentially conflicting tools on my win32 machine and then debug...

I am trying to view the source code of the function nlm in the stats package of R 2.4.1. I downloaded the source from CRAN and opened nlm.R, and it calls a .Internal function: .Internal(nlm(function(x) f(x, ...), p, hessian, typsize, fscale, msg, ndigit, gradtol, stepmax, steptol, iterlim)) This is the same thing I saw when entering the function name at the R command

Dear R list members, I have a question about the proper use of the typsize and fscale arguments to nlm. I use nlm in my sem package to fit general structural-equation models, which entails maximizing a multinormal likelihood with respect to parameters that represent regression coefficients and covariances of variables. The magnitudes of these parameters can be very different. The

I've been trying to figure out how to get the names of the parameter vector variables when inside the function that nlm calls to return the objective function value: knls <- function( theta, eqns, data, fitmethod="OLS", instr=NULL, S=NULL ) { ## print( names( theta ) ) # returns NULL ## get the values of the parameters for( i in 1:length( theta ) )