[Rcpp-devel] failed to compile code on the server with simple operations on matrices with type fmat {RcppArmadillo}

[Dirk Eddelbuettel]

It also works for me on Linux:

R> sourceCpp("/tmp/yueli.cpp")

R> set.seed(42)

R> x <- matrix(rnorm(4),2,2)

R> y <- matrix(rnorm(4),2,2)

R> fmatMultiply(x, y)
          [,1]     [,2]
[1,]  0.515698  2.03786
[2,] -0.295452 -0.91346
R>

so I strongly suspect that what I just stated is true: it works if R uses an
external (complete) LAPACK; it fails when R internal's LAPACK is used as
sgemm is of no interest to R.

Use mat instead of fmat, or if you insist, rebuild R on the server.

Dirk

PS  My version of your file below

// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-

// we only include RcppArmadillo.h which pulls Rcpp.h in for us
#include <RcppArmadillo.h>

// [[Rcpp::depends(RcppArmadillo)]]

using namespace Rcpp;
using namespace arma;

// [[Rcpp::export]]
fmat fmatMultiply(fmat x, fmat y) {
        fmat ans = x * y;

        return ans;
}

/*** R
set.seed(42)
x <- matrix(rnorm(4),2,2)
y <- matrix(rnorm(4),2,2)
fmatMultiply(x, y)
*/


-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org