I must say that I agree with Andrew. I recently did just that: took an R package with C code and turn it into a stand-alone C program. Granted I'm far from being a C expert, but not only that the code didn't run any faster (because all the heavy computations were already done in C anyway), but I had to spend lots and lots of time debugging the new code. If I have the choice, I wouldn't do it. (No, I didn't have that choice...)
Cheers, Andy > -----Original Message----- > From: Andrew C. Ward [mailto:[EMAIL PROTECTED] > Sent: Monday, July 21, 2003 10:20 PM > To: [EMAIL PROTECTED] > Cc: r-help > Subject: Re: [R] R and C++ compared with only C++ > > > As always, it depends on your priorities and motivation. If > that extra 10% is important and if you can be bothered > writing the C++, then putting the whole thing into C++ may be > worth it. If not then you could let R deal with the input and output. > > Regards, > > Andrew C. Ward > > CAPE Centre > Department of Chemical Engineering > The University of Queensland > Brisbane Qld 4072 Australia > [EMAIL PROTECTED] > > > Quoting Francisco J Molina <[EMAIL PROTECTED]>: > > > > > My computer is a pentium 4 running at 2.4 GHz. > > My R is 1.7.1 > > > > I have written a program in R that calls C++. The program > spends most > > of the time in C++ ( > 90% ). R basically deals with output and > > input. > > How slower can this be compared with the program I would > > get from rewriting > > everything in C++? > > > > Thank you. > > > > ______________________________________________ > > [EMAIL PROTECTED] mailing list > > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo> /r-help > ------------------------------------------------------------------------------ Notice: This e-mail message, together with any attachments, ...{{dropped}} ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
