float64_t CLatentSOSVM::do_inner_loop(float64_t cooling_eps)
{
float64_t lambda = 1/m_C;
CDualLibQPBMSOSVM* so = new CDualLibQPBMSOSVM();
so->train();
/* copy the resulting w */
SGVector<float64_t> cur_w = so->get_w();
memcpy(w.vector, cur_w.vector, cur_w.vlen*sizeof(float64_t));
/* get the primal objective value */
float64_t po = so->get_result().Fp;
SG_UNREF(so);
return po;
}
int main(int argc, char * argv[])
{
// initialization
//-------------------------------------------------------------------------
float64_t lambda=0.01, eps=0.01;
bool icp=1;
uint32_t cp_models=1;
ESolver solver=BMRM;
uint32_t feat_dim, num_feat;
init_shogun_with_defaults();
if (argc > 1 && argc < 8)
{
SG_SERROR("Usage: so_multiclass_BMRM <data.in> <feat_dim> <num_feat> <lambda> <icp> <epsilon> <solver> [<cp_models>]\n");
return -1;
}
if (argc > 1)
{
// parse command line arguments for parameters setting
SG_SPRINT("arg[1] = %s\n", argv[1]);
feat_dim=::atoi(argv[2]);
num_feat=::atoi(argv[3]);
lambda=::atof(argv[4]);
icp=::atoi(argv[5]);
eps=::atof(argv[6]);
if (strcmp("BMRM", argv[7])==0)
solver=BMRM;
if (strcmp("PPBMRM", argv[7])==0)
solver=PPBMRM;
if (strcmp("P3BMRM", argv[7])==0)
solver=P3BMRM;
if (argc > 8)
{
cp_models=::atoi(argv[8]);
}
}
else
{
// default parameters
feat_dim=DIMS;
num_feat=NUM_SAMPLES*NUM_CLASSES;
lambda=1e3;
icp=1;
eps=0.01;
solver=BMRM;
}
SGVector<float64_t> labs(num_feat);
SGMatrix<float64_t> feats(feat_dim, num_feat);
if (argc==1)
{
gen_rand_data(labs, feats);
}
else
{
// read data
read_data(argv[1], feat_dim, num_feat, labs, feats);
}
// Create train labels
CMulticlassSOLabels* labels = new CMulticlassSOLabels(labs);
// Create train features
CDenseFeatures< float64_t >* features =
new CDenseFeatures< float64_t >(feats);
// Create structured model
CMulticlassModel* model = new CMulticlassModel(features, labels);
// Create SO-SVM
CDualLibQPBMSOSVM* sosvm =
new CDualLibQPBMSOSVM(
model,
labels,
lambda);
SG_REF(sosvm);
sosvm->set_cleanAfter(10);
sosvm->set_cleanICP(icp);
sosvm->set_TolRel(eps);
sosvm->set_cp_models(cp_models);
sosvm->set_solver(solver);
// Train
//-------------------------------------------------------------------------
SG_SPRINT("Train using lambda = %lf ICP removal = %d \n",
sosvm->get_lambda(), sosvm->get_cleanICP());
sosvm->train();
BmrmStatistics res = sosvm->get_result();
SG_SPRINT("result = { Fp=%lf, Fd=%lf, nIter=%d, nCP=%d, nzA=%d, exitflag=%d }\n",
res.Fp, res.Fd, res.nIter, res.nCP, res.nzA, res.exitflag);
CStructuredLabels* out =
CLabelsFactory::to_structured(sosvm->apply());
SG_REF(out);
SG_SPRINT("\n");
// Compute error
//-------------------------------------------------------------------------
float64_t error=0.0;
for (uint32_t i=0; i<num_feat; ++i)
{
CRealNumber* rn = CRealNumber::obtain_from_generic( out->get_label(i) );
error+=(rn->value==labs.get_element(i)) ? 0.0 : 1.0;
SG_UNREF(rn); // because of out->get_label(i) above
}
SG_SPRINT("Error = %lf %% \n", error/num_feat*100);
// Free memory
SG_UNREF(sosvm);
SG_UNREF(out);
exit_shogun();
return 0;
}