You need to pass it as a vector and then you can convert to an array structure in C. Look at carray.c for one way to do this, there are others. Browse the source code and see how different authors handle your problem.
Matt Austin Statistician Amgen, Inc 800 9AMGEN9 x77431 805-447-7431 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of johan Faux Sent: Monday, March 20, 2006 1:13 PM To: r-help Subject: [R] How can I pass a R matrix as parameter to C code? Hello, Is it possible to pass R matrix as a parameter to an internal C procedure? From the documentation I got the impression that only 1-dim vectors can be passed. Why the following wont work for me? > a<-matrix(1:15,3,5) > .C("pr",as.integer(a)) void pr(int **a){ a[1][1]=100; } Thanks, Johan --------------------------------- [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
