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Hello Gurus, I have built a code snippet using R.net wherein I call couple of R scripts to run optimization packages and use the output in C# code. The way I call the R scripts is just by providing...

I am able to perform regression on a dataset as below: plot(x,y) lin.mod <- lm(y~x) m <- mean(x) m segmented.mod <- segmented(lin.mod, seg.Z = ~x, psi= m) plot(segmented.mod, add=T) sl <- slope...

Hi All, For a non-linear minimization optimization problem that I have, I am getting better objective function value in Excel(15) as compared to nloptr (73). the nloptr is setup as: opts = list("algorithm"="NLOPT_LN_COBYLA", "xtol_rel...

Hello All, I use nloptr to perform optimization. In one example,the lb for each variable is 0 and ub is Inf during the first run. x <- c(10,10,10,10) # initial values lb <- c(0,0,0,0...

Hello Gurus, I intend to build attached reference graph in R(r.png). Could you give me some ideas on how it can be done, if at all possible? Basically, I would like to build a Histogram along Y axis...

Hi, I am going to be attempting a build of R for the alphas (our main need is to collate and present graphically, performance metrics we gather on our applications). We have: CC=cc, CXX=cxx, Fortran V5.51 (f77...

Hello All, I have a matrix with initial values as below and I need to optimize the variables that are greater than 0. TAU fij fij2 [1,] 14.33375 0.0000000 0.01449572 [2,] 14.33375 0.0000000 0.00000000...

Hello Folks, I am using "nloptr" optimizer in my program as below. my.data.var <- c(10,0.25,0.25,0.25,0.25,0.25, 10,0.25,0.25,0.25,0.25,0.25, 10,0...

Thanks Duncan. That's useful to know. On Fri, Oct 14, 2016 at 9:18 AM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 14/10/2016 10:00 AM, Narendra Modi wrote: >> >> Hello Gurus, >> >> I have built a...

Thanks Jean, let me have a look! On Tue, Dec 20, 2016 at 9:49 AM, Adams, Jean <jvadams at usgs.gov> wrote: > You might find the code in this blog post helpful. > http://theanalyticalminds.blogspot.com/2015/03/part...

Thanks! that worked. I also tested with the below method although your solution is faster and done in fewer steps. inter <- intercept(segmented.mod) inter.m <- as.matrix(inter$x) inter.row <- nrow(inter.m) answer <- inter.m[inter.row...

Hello, Resending this message in "Plain-text". Thank you for the add to the list. I have written a R snippet to solve a non-linear problem using Optim solver. The parameters to be solved are supposed to be in...

I have put together a R snippet wherein I am trying to get optimum values for which error is minimized. The error is the difference between two matrices. Every time I run the below code, I don't see any...

Ooops. I can change that real quick. Any help on the problem itself Ranjan? Thanks! On Fri, Jun 17, 2016 at 9:22 AM, Ranjan Maitra < maitra.mbox.ignored at inbox.com> wrote: > You need to send e-mail from...

Thanks Prof Nash. The reason I used nlopr() in my problem is due to non linear constraints. I wonder if optimrx/optim can model the below scenario. I will be elated if it can. The problem in hand goes like...

Hi Bob, Could you explain a bit more on this? How do I use/configure base64? Any document/example do you have? On Fri, Oct 14, 2016 at 9:55 AM, Bob Rudis <bob at rud.is> wrote: > Ugly idea...

R Listers, One of the list contributors suggested I abandon attempts to build R-1.9.1 and focus on building R-2.3.1. I believe the main set of packages have been built properly (with some changes to...

Hi, I am attempting to build R on Alpha servers running Tru64 UNIX. I am having problems building R 2.3.0 so am attempting to build older releases. I have been able to build R 1.9.1 without...