search for: lp_solve

Hi, I am working with lpSolve "R" package by Sam Buttrey, buttrey at nps.navy.mil , which is interface to lp_solve linear/integer programming system. You can find information about lp_solve at http://groups.yahoo.com/group/lp_solve/ (free registration required). lpSolve (R package) supports linear and integer programming but it does not support semi-continuous variables and Special Ordered Sets (SOS)...

How to define bounds for a semi continous variable in lp_solve. Min 5x1 +9x2 +7.15x3 +0.1x4 subject to x1+x2+x3+x4=6.7 x1+x4 <= 6.5 And x3 can be 0 or greater than 3.6 hence x3 is a semi continous variable how to define bounds as well as semicontinous function because using set.semicont and set. bound simantaneously doesn't seem to work.Thanks in ad...

...2, Issue 06 Johnstone and Silverman EbayesThresh: R Programs for Empirical Bayes Thresholding Volume 12, Issue 08 Nason pinktoe: Semi-automatic Traversal of Trees Volume 14, Issue 01 Imai and Van Dyk MNP: R Package for Fitting the Multinomial Probit Model Volume 14, Issue 03 Buttrey Calling the lp_solve Linear Program Software from R, S-PLUS and Excel Volume 14, Issue 04 Zeileis and Grothendieck zoo: S3 Infrastructure for Regular and Irregular Time Series Volume 14, Issue 06 Terpstra and McKean Rank-Based Analyses of Linear Models using R Volume 14, Issue 07 === Jan de Leeuw; Distinguished Prof...

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,

...2, Issue 06 Johnstone and Silverman EbayesThresh: R Programs for Empirical Bayes Thresholding Volume 12, Issue 08 Nason pinktoe: Semi-automatic Traversal of Trees Volume 14, Issue 01 Imai and Van Dyk MNP: R Package for Fitting the Multinomial Probit Model Volume 14, Issue 03 Buttrey Calling the lp_solve Linear Program Software from R, S-PLUS and Excel Volume 14, Issue 04 Zeileis and Grothendieck zoo: S3 Infrastructure for Regular and Irregular Time Series Volume 14, Issue 06 Terpstra and McKean Rank-Based Analyses of Linear Models using R Volume 14, Issue 07 === Jan de Leeuw; Distinguished Prof...

Dear listers, a central problem in conservation biology is the selection of sites in reserve network design. many algorithms have been published, and I was wondering any have been implemented in R. I did not seen anything on CRAN or R-help, or on the web in general. Best regards, Eric Eric Pante ---------------------------------------------------------------- College of Charleston, Grice

Dear R-users, i try to solve to following linear programm in R 0 * x_1 + 2/3 * x_2 + 1/3 * x_3 + 1/3 * x_4 = 0.3 x_1 + x_2 + x_3 + x_4 = 1 x_1, x_2, x_3, x_4 > 0, x_1, x_2, x_3, x_4 < 1 as you can see i have no objective function here besides that i use the following code. library(lpSolve) f.obj<-c(1,1,1,1) f.con<-matrix(c(0,2/3,1/3,1/3, 1,1,1,1,