search for: nuopt

Does anyone know whether R has its own modeling language for optimization problems (like SIMPLE in NuOPT for S-plus)? Paolo

...rof Brian Ripley [mailto:ripley at stats.ox.ac.uk] > On Wed, 28 Nov 2001, Janusz Kawczak wrote: > > > R-users and R-developers: > > > > do you know of any package in R (or for R) that can perform optimizations > > for a linear and non-linear systems? I am aware of the NUOPT module in > > S-Plus that provides an optimizer engine to do just that and more. > > That's not really NUOPT's description as I recognize it (and I do have > S+NUOPT on this machine). > > R has optim, package quadprog, and function simplex in package boot > related t...

...h difficulty in R. But what about the compiled data. I am not a system programmer so don't know much about compiling/ undoing that. >From my understanding it is going to be difficult, is that my understanding right.? Thanks -- View this message in context: http://n4.nabble.com/Exporting-Nuopt-from-splus-to-R-tp1748681p1748681.html Sent from the R help mailing list archive at Nabble.com.

Dear all, I am a relative newcomer to the R language, and am sussing out the possibilities of using R to do integer programming (which I am also new to). Is there something along the lines of the NUOPT S- PLUS package that is available, or on the way, for R? Are there other options for integer programming in R? Thanks very much in advance, Robin Naidoo University of Alberta Edmonton, AB, Canada

Hello, I've had a quick look on the list and can't find an answer to this niggle. Whilst debugging some code, I noticed that looping variables in R are not local to the loop as seams common in procedural languages. For example consider the following piece of code: for(i in 1:3){ cat(i,"") for(i in c("a","b","c")){ cat(i,"")

Dear list members, I am trying to get information on how to fit a linear regression with constrained parameters. Specifically, I have 8 predictors , their coeffiecients should all be non-negative and add up to 1. I understand it is a quadratic programming problem but I have no experience in the subject. I searched the archives but the results were inconclusive. Could someone provide suggestions

...talk discusses two common applications of resampling in finance. The first uses resampling techniques to differentiate between manager skill and luck. The second resamples portfolios to produce alternative asset allocations and to provide rules for rebalancing. In each case S-PLUS, coupled with S+NuOpt are in a unique position to provide quick computational solutions to these problems. 4:00 PM Douglas Niemann, Zurich Financial Services Abstract to follow 4:45 PM Closing Remarks 5:00 PM Cocktail Reception Register Now! http://www.insightful.com/news_events/UKfinance05/default.asp There are...

Hello list, I am dealing with a noisy function (gradient,hessian not available) with simple boundary constraints (x_i>0). I've tried constrOptim() using nelder mead to minimize it but it is way too slow and the returned results are not satisfying. simulated annealing is so hard to tune and it always crashes R program in my case. I wonder if there are any packages or functions can do

Hi all, I have Splus and R both on my unix machine. I intend to keep only one of them. R looks to be a better choice. But I want to confirm. Is there any function or group of functions in Splus that are absent in R? Thanks, Saket. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send

Can someone help me understand the following: > D(expression(dnorm(x, mean)), "mean") [1] 0 > sessionInfo() R version 2.2.1, 2005-12-20, i386-pc-mingw32 attached base packages: [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" [7] "base" By my computations, this should be