I did not know this before. I installed it as you suggested. what to do next? Best, Wei
________________________________ From: David Winsemius <dwinsem...@comcast.net> Cc: "r-help@r-project.org" <r-help@r-project.org> Sent: Sunday, February 19, 2012 6:44 PM Subject: Re: [R] installing the package Rcplex Just a guess (based on evidence of failing to read other instructions that were made available), but have you perhaps forgotten to install Rtools for Windows? http://cran.r-project.org/bin/windows/Rtools/ --David. On Feb 19, 2012, at 5:13 PM, zheng wei wrote: > 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. > > [[elided Yahoo spam]] > William > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
