gistfile1.txt

#include <shogun/base/init.h>
#include <shogun/base/some.h>                                     
#include <shogun/distance/Distance.h>
#include <shogun/features/Features.h>
#include <shogun/io/File.h>
#include <shogun/io/SerializableAsciiFile.h>
#include <shogun/lib/DynamicObjectArray.h>
#include <shogun/lib/SGMatrix.h>
#include <shogun/lib/SGVector.h>
#include <shogun/lib/observers/ParameterObserver.h>
#include <shogun/machine/Machine.h>                                
#include <shogun/mathematics/Math.h>                        
#include <shogun/util/factory.h>

using namespace shogun;         

int main(int, char*[])                                               
{                                             
init_shogun_with_defaults();                                           
                                   
CMath::init_random(1);             
auto f_feats_train = wrap(csv_file("../../data/classifier_binary_2d_linear_features_train.dat"));

auto features_train = wrap(features(f_feats_train));
                                                                   
auto d = wrap(distance("EuclideanDistance"));
d->put("lhs", features_train);
d->put("rhs", features_train);

auto kmeans = wrap(machine("KMeans"));
kmeans->put("k", 2);
kmeans->put("distance", d);

auto logger = wrap(parameter_observer("ParameterObserverLogger"));
kmeans->subscribe(logger);

kmeans->train();

auto c = wrap(kmeans->get<SGMatrix<float64_t>>("cluster_centers"));

SG_SPRINT(c.to_string().c_str())

exit_shogun();
return 0;
}

// Output 

root@404b07532e89:~/shogun/build/examples/meta/cpp/observers# ./a.out
[20130564581] Received a matrix called "mus" which contains: [
[       -2.09397,       0.45498],
[       -1.12079,       2.15617]
]
[20130564599] Received a matrix called "mus" which contains: [
[       -1.94008,       2.07997],
[       -1.85142,       1.96843]
]
[