
On Feb 19, 2012, at 7:45 PM, zheng wei wrote:

> I did not know this before. I installed it as you suggested. what to  
> do next?

Read the Installation Manual?

-- 
David.
>
> Best,
> Wei
>
> From: David Winsemius <dwinsemius@comcast.net>
> To: zheng wei <zhengwei0204@yahoo.com>
> 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.
> >
> >
> > Thank you very much!
> > 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
>
>
>

David Winsemius, MD
West Hartford, CT


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