similar to: help using R's linprog for LP

Dear R team! =20 I found in HTML help for function solveLP(linprog) a small mistake. It says in Description "Minimizes c'x, subject to A x >=3D b and x >=3D 0", but tests show that there should be A x <=3D b. =20 Best regards, =20 Ludek =20 =20 [[alternative HTML version deleted]]

Full_Name: wfeng Version: 2.7 OS: windows xp Submission from: (NULL) (208.62.252.2) for solveLP(linprog), the program is specified as Minimizes c'x, subject to A x >= b and x >= 0. However, what I found is the actual constraints that works with the function are A x <= b and x >= 0.

If I run cvec<-c("test.f", "test.sf", "try.g","try.res", "try.f") print(cvec) indx<-grep('\.f',cvec,perl=TRUE) fset<-cvec[indx] print(fset) I get > cvec<-c("test.f", "test.sf", "try.g","try.res", "try.f") > print(cvec) [1] "test.f" "test.sf"

dear all. Would someone be kind and willing to explain the code below for a person who has never used R? ( that is if one has enough time and inclination) It implements gillepsie's stochastic algorithm for Lotka Volterra model. What would help me tremendously is to see the breakdown of the line by line code into plain english. thanks for any insights or other comments. sean

Hi list, I want to find the total maximum resources I can spend given a set allocation proportion and some simple budget constraints. However, I get suboptimal results via lp and friends (i.e. lpSolve and simplex in the linprog and boot) . For example: library(lpSolve) proportions = c( 0.46, 0.28, 0.26) constraints = c( 352, 75, 171) lp(objective.in = proportions, const.mat =

On Sat, Jan 31, 2015 at 7:05 PM, Dirk Eddelbuettel <edd at debian.org> wrote: [...] > - either work in something like OpenMP and run in multiple threads that > remain /completely/ shielded from R, ie no R calls, and not even R data > types as you cannot trigger gc() calls from different threads > I think you can use R objects, as long as you don't call R functions on

Hi all, Is there any standard plugin available for date validations, email address validation & url validations in rails? Thanks in advance, Medha. -- If not you then who..... If not now then when...... ----------------------------------------------------- With Best Regards, Medha. -------------- next part -------------- An HTML attachment was scrubbed... URL:

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

Hi all, I want to execute certain ruby script periodically in my rails application running on windows platform. I wanted to try out backgroundrb, but it seems that the support for Windows is deprecated with release 0.2.0 of BackgrounDRb. The latest release is 0.2.1 & the plugin still doesnt support windows platform. Can anyone throw more light on this? Also, can anyone suggest any

Hi everyone, i?m a new user of R and i?m trying to translate an linear optimization problem from Matlab into r. The matlab code is as follow: options = optimset('Diagnostics','on'); [x fval exitflag] = linprog(f,A,b,Aeq,beq,lb,ub,[],options); exitflag fval x=round(x); Where: f = Linear objective function vector (vector of 45,rows) A = Matrix for linear inequality

Hi all, I am facing a problem while using rails "migrate" feature for creating tables in a database. Following are the details. I have 2 applications say "app1" & "app2". I want both of them to use same database say "testdb". For "app1", I create 3 models which in turn create 3 migration files with prefix, 001_, 002_ & 003_. Now I

Hi, I am a newbie to ruby & rails. Can anybody give me some inputs as to how to download & use standard rails plugins. Any help regarding this will be greatly appreciated. -- If not you then who..... If not now then when...... ----------------------------------------------------- With Best Regards, Medha. -------------- next part -------------- An HTML attachment was scrubbed...

Hi, I wrote a package for linear programming and want to submit it to CRAN. Since the package 'quadprog' has a function with the name 'solve.QP' to perform Quadratic Programming, I named my (main) function 'solve.LP'. However 'R CMD check' gives one warning: * checking generic/method consistency ... WARNING solve: function(a, b, ...) solve.LP:

Dear all, I am trying to find a solution satisfying the below equations in R. Set up the problem 9 X1+ X2 + X3 = 2 X1+ X2 + X3 = 1 which is subjected to 0 < X1 < X2 < X3 < 2. I have downloaded the packages \'linprog\' and \'lpSolve\' but can not see how to solve the question. Thank you for your help. With

Hello, I am trying to get a package to pass R CMD check on an iMac running Mac OS X. When the package is named safeBinaryRegression I get the following warning from R CMD check: * checking whether the name space can be loaded with stated dependencies ... WARNING Error in dyn.load(file, DLLpath = DLLpath, ...) : function 'make_lp' not provided by package 'lpSolveAPI'

On 31 January 2015 at 19:29, G?bor Cs?rdi wrote: | On Sat, Jan 31, 2015 at 7:05 PM, Dirk Eddelbuettel <edd at debian.org> wrote: | [...] | | - either work in something like OpenMP and run in multiple threads that | ? ?remain /completely/ shielded from R, ie no R calls, and not even R data | ? ?types as you cannot trigger gc() calls from different threads | | | I think you can

Hello, I'm writing an R extension in C++. In the extension, I want to invoke an R function directly and it works when I use Rcpp in the serial code. But what I really want is to invoke the R function in parallel with openmp. When I do so, I got segmentation fault. I remember someone said that R isn't thread-safe. I think it's also understandable because an R function also has

I''ve been banging my head against the wall trying to update a table (add/delete rows) using Ajax. It seems simple enough but just doesn''t work for me. I can get it to work using DIVs instead of a table, but doing the layout with DIVs is much more cumbersome and I know it works for others with a table (though I haven''t been able to find an exact example code anywhere).

Dear all I have samba PDC, i added all the computer names with $prefixed in /etc/passwd tdc$:x:1020:501::/dev/null:/sbin/nologin and added the computer with smbpasswd -a -m tdc and added root with smbpasswd -a root and gave password but when i go to the tdc computer, and the computer to the domain name, it says, Logon Failure, Unknown username or Bad password, But i am giving correct username

Dear all is there any linear programming routine available for R? if not, can you suggest any alternatives? not need to be very powerful, I get only a samll problem to resolve. many thanks yong