Dear All, I have difficulty in installing the package of Rcplex. Its description web is at http://cran.r-project.org/web/packages/Rcplex/index.html First, I tried -------------------------------------------------------------------------------------------------- url <- "http://cran.r-project.org/src/contrib/Rcplex_0.3-0.tar.gz";; download.file(url, basename(url), mode="wb") install.packages(basename(url), repos=NULL) -------------------------------------------------------------------------------------------------- but got the error of -------------------------------------------------------------------------------------------------- > install.packages(basename(url), repos=NULL) Error in gzfile(file, "r") : cannot open the connection In addition: Warning messages: 1: In unzip(zipname, exdir = dest) : error 1 in extracting from zip file 2: In gzfile(file, "r") : cannot open compressed file 'Rcplex_0.3-0.tar.gz/DESCRIPTION', probable reason 'No such file or directory' -------------------------------------------------------------------------------------------------- Then, I looked into the installation instruction of this package at http://cran.r-project.org/web/packages/Rcplex/INSTALL Since I am using windows, I was looking at the instruction as -------------------------------------------------------------------------------------------------- ***WINDOWS***
Installation on Windows systems is done by using the provided Makevars.win file in the src directory. It contains the following lines: PKG_CPPFLAGS=-I<CPLEX_DIR>/include PKG_LIBS=-L<CPLEX_DIR>/lib/x86_windows_vs2008/stat_mda -lcplex111 -lm where <cplex_dir> is the cplex installation directory e.g. /c/ilog/cplex111. Please edit your Makevars.win file accordingly. We have successfully tested this procedure with CPLEX 11.1 on 32-bit Windows XP. -------------------------------------------------------------------------------------------------- I do not understand what it means exactly. I do fine the file of Makevars.win, and confirmed the content as described above. But what directory should I replace "/c/ilog/cplex111", and how to proceed so as to install the package. I got no idea. One thing to note is that it is stated from the web http://cran.r-project.org/web/views/Optimization.html that -------------------------------------------------------------------------------------------------- Interfaces to Commercial Optimizers This section surveys interfaces to commercial solvers. Typically, the corresponding libraries have to be installed separately. * PackagescplexAPI andRcplex provide an interface to the CPLEX solver package from IBM . CPLEX provides dual/primal simplex optimizers as well as a barrier optimizer for solving large scale linear and quadratic programs. Furthermore, it offers a mixed integer optimizer to solve difficult mixed integer programs. Note that CPLEX is not free and you have to get a license from IBM . Academics will receive a free licence upon request. [LP, IP, BP, QP, MILP, MIQP, IPM] -------------------------------------------------------------------------------------------------- I am not sure the above statement is relevant or not. In case there is a necessary to get the license, since I work in a university and I think I could figure out how to get it by consulting the support within my own university. Thank you very much! William [[alternative HTML version deleted]]
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