[mlpack-git] [mlpack] Problem Linking MLPACK on Mac (#441)

[Emmanuel John]

I'm trying to use the kmeans module. Below is the example source and the error I get:

		using namespace mlpack::kmeans;
		using namespace mlpack::metric;
		// The dataset we are clustering.
		arma::mat data(1, edges.size());
		int col =0;
		for(Edge& e: edges){
			//std::cout<<e<<std::endl;
			data(0,col) = e.weight;
			col++;
		}
		
		// The number of clusters we are getting.
		size_t clusters = 5;
		// The centroids will be stored in this matrix.
		
		
		// The assignments will be stored in this vector.
		arma::Col<size_t> assignments;

		// Initialize with the default arguments.
		//KMeans<SquaredEuclideanDistance,RefinedStart, MaxVarianceNewCluster> k;
		KMeans<> k;
		//RefinedStart k;
		k.Cluster(data, clusters, assignments);

		for(int i =0;i<edges.size();i++){
			std::cout<<edges[i].weight<<" "<<assignments(i)<<std::endl;
		}

And I get the following linker error:

    Undefined symbols for architecture x86_64:
    "mlpack::util::PrefixedOutStream::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)       (std::basic_ostream<char, std::char_traits<char> >&))", referenced from:
      Graph::sparsifyGraph()      in graph.o
    ld: symbol(s) not found for architecture x86_64
    collect2: error: ld returned 1 exit status
    make: *** [run] Error 1    

I get the same error whether I install mlpack with homebrew or from source. I'm using a Macbook pro with OSX 10.10 Yosemite.

Any help would be appreciated.

---
Reply to this email directly or view it on GitHub:
https://github.com/mlpack/mlpack/issues/441
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