similar to: Optimisation

Dear All I am a stats newbie and have a basic stats question; i have y as dependent variable and x1 to x5 as dependent variable. I need to know which variables x1 to x5 are actually affecting y. How do I find out? can an example be given which makes things clear (if possible)? Thanks Parth

I am new comer in R.There r few IDE like Tinn R,VIM etc.I mean How to use them? Do I need to install R and then install them to use or they can work alone? Also does one install packages on R or IDEs? Can I call/use the package from IDEs? regards Parth -- Socrates, proclaimed: "I came to know one thing; that I know nothing".

I use win 10 ( 64 bit) with latest R available. Intel has released math kernel library. Is it necessary to install for data driven work ? Regards Partha [[alternative HTML version deleted]]

1.what is the application to install for to speed up processing for multicore processor in windows environment? 2. how to compute time for executing a particular a code? [[alternative HTML version deleted]]

I am using R(3.4.3), Win 7(extreme edition) 32 bit, I have 10 excel files data1,xls, data2.xls .. till data10.xls. I want to create 10 dataframes . How to do ? regards Parth [[alternative HTML version deleted]]

Sir, Which modules/package should I use to solve the following statistical models: 1. Multiple Objective Programming (MOP) 2. Data Envelopment Analysis (DEA) 3. Lab Experiments 4. Multiple Criteria Decision Making (MCDM) Regards, PS

I have a piece of code (from Xie et al. 2009 Autophagy 5:217) that runs in R and requires the glpk package. A year or so ago, I was able to download and install the glpk package directly from insider the R program (for Windows), and everything worked fine. Now I have installed R for Windows on a new computer, and I cannot find the glpk package on the list of available packages on my local

In my post at https://stat.ethz.ch/pipermail/r-help/2011-October/292019.html I included an undefined term "ej". The problem code should be as follows. It seems like a simple linear programming problem, but for some reason my code is not finding the solution. obj <- c(rep(0,3),1) col1 <-c(1,0,0,1,0,0,1,-2.330078923,0) col2 <-c(0,1,0,0,1,0,1,-2.057855981,0) col3

While working on 'random walk' applications, I got interested in optimizing noisy objective functions. As an (artificial) example, the following is the Rosenbrock function, where Gaussian noise of standard deviation `sd = 0.01` is added to the function value. fn <- function(x) (1+rnorm(1, sd=0.01)) * adagio::fnRosenbrock(x) To smooth out the noise, define another

I don't want to re-invent the wheel, and I'm trying to code up something that does a Nelder-Mead simplex method to minimise a non-linear objective function. (I'm porting something I originally wrote in matlab, using the optimisation toolbox funciton fmins). Is there already something available to do this included in R? Do people have suggestions on the best way to do this? Thanks,

Recently, a package for convex optimization was announced for Python, based upon the LP solver GLPK, the SDP solver in DSDP5, and the LP and QP solvers in MOSEK. I'm aware GLPK is available for R, but wondered if anyone had good packages for convex optimization along these lines for R. TIA.

Hi. I am aware of three different R packages for linear programming: glpk, linprog, lpSolve. From what I can tell, if there are N variables and M constraints, all these solvers require the full NxM constraint matrix. Some linear solvers I know of (not in R) have a sparse matrix input format. Are there any linear solvers in R that have a sparse matrix input format? (including the

Dear R users, I am pleased to announce the release of three new R packages: optimbase, optimsimplex, and neldermead. - optimbase provides a set of commands to manage an abstract optimization method. The goal is to provide a building block for a large class of specialized optimization methods. This package manages: the number of variables, the minimum and maximum bounds, the number of non linear

Dear R users, I am pleased to announce the release of three new R packages: optimbase, optimsimplex, and neldermead. - optimbase provides a set of commands to manage an abstract optimization method. The goal is to provide a building block for a large class of specialized optimization methods. This package manages: the number of variables, the minimum and maximum bounds, the number of non linear

I see that the definition of axis() has changed from 1.5.1 to 1.6.1 (as mentioned in the news file for 1.6.0). Axis now has a color argument to change it's color. However, the following command worked in 1.5.1: > axis(1, at = c(0.1, 0.2, 1, 5, 10), fg= gray(0.7), cex.axis = 0.8, col.axis= "red") #plot the axis in gray with annotations in red. The command no longer works in

It does, when the function has a body. When it doesn't, it ignores <https://godbolt.org/g/2BCvht>. The body might be provided later on in the toolchain via linking a library. Regards, Soham Sinha PhD Student, Department of Computer Science Boston University On Tue, Jun 26, 2018 at 10:25 AM Hans Wennborg <hans at chromium.org> wrote: > It works for me: > >

As a big fan of Wikipedia, it's frustrating to see how little there is about R in the correlated project, the Wikibooks: http://en.wikibooks.org/wiki/R_Programming Alberto Monteiro

Sir: Is it possible to stop sending me email till January 12,2005. I will be away from my workplace. Partha

While plotting a table using plot(table), I am not able to suppress the axes with axes = FALSE. Am I missing something or is it a bug? For example: > x <- c(rep(0, 7), rep(1, 4), rep(5, 3), rep(6, 4), rep(8, 10)) > table(x) > plot(table(x), axes = FALSE) #does not suppress the axes > plot(table(x), frame.plot= FALSE, axes = FASLE) #deliberate spelling

For the same reason GCC allowed the attribute. Even if I want to use/inline a function later on in the pipeline. Regards, Soham Sinha PhD Student, Department of Computer Science Boston University On Tue, Jun 26, 2018 at 8:30 AM mayuyu.io <admin at mayuyu.io> wrote: > Out of curiosity, how does an unused declaration affect the emitted object > file > > Zhang > > > 在