Added tree regularized logistic regression and fixed least squares re…

…gressors support
shogun-toolbox · Jul 1, 2012 · df424fa · df424fa
1 parent 5643f9a
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Showing 10 changed files with 580 additions and 62 deletions.
diff --git a/examples/undocumented/libshogun/transfer_multitasklogisticregression.cpp b/examples/undocumented/libshogun/transfer_multitasklogisticregression.cpp
@@ -0,0 +1,50 @@
+#include <shogun/labels/RegressionLabels.h>
+#include <shogun/features/DenseFeatures.h>
+#include <shogun/transfer/multitask/Task.h>
+#include <shogun/transfer/multitask/TaskGroup.h>
+#include <shogun/transfer/multitask/MultitaskLogisticRegression.h>
+#include <shogun/base/init.h>
+#include <shogun/lib/common.h>
+#include <shogun/io/SGIO.h>
+
+using namespace shogun;
+
+void print_message(FILE* target, const char* str)
+{
+	fprintf(target, "%s", str);
+}
+
+int main(int argc, char** argv)
+{
+	init_shogun(&print_message);
+
+	// create some data
+	SGMatrix<float64_t> matrix(2,4);
+	for (int32_t i=0; i<2*4; i++)
+		matrix.matrix[i]=i;
+
+	CDenseFeatures<float64_t>* features= new CDenseFeatures<float64_t>(matrix);
+
+	// create three labels
+	CRegressionLabels* labels=new CRegressionLabels(4);
+	labels->set_label(0, -1);
+	labels->set_label(1, +1);
+	labels->set_label(2, -1);
+	labels->set_label(3, +1);
+
+	CTask* first_task = new CTask(0,2);
+	CTask* second_task = new CTask(2,4);
+
+	CTaskGroup* task_group = new CTaskGroup();
+	task_group->add_task(first_task);
+	task_group->add_task(second_task);
+
+	CMultitaskLogisticRegression* regressor = new CMultitaskLogisticRegression(0.5,features,labels,task_group);
+	regressor->train();
+
+	regressor->set_current_task(0);
+	regressor->get_w().display_vector();
+	SG_UNREF(regressor);
+	exit_shogun();
+	return 0;
+}