Refactor sample to be out of main CMakeLists

sample/lib/mdlp/Metrics.h

@@ -0,0 +1,22 @@
+#ifndef CCMETRICS_H
+#define CCMETRICS_H
+
+#include "typesFImdlp.h"
+
+namespace mdlp {
+    class Metrics {
+    protected:
+        labels_t& y;
+        indices_t& indices;
+        int numClasses;
+        cacheEnt_t entropyCache = cacheEnt_t();
+        cacheIg_t igCache = cacheIg_t();
+    public:
+        Metrics(labels_t&, indices_t&);
+        void setData(const labels_t&, const indices_t&);
+        int computeNumClasses(size_t, size_t);
+        precision_t entropy(size_t, size_t);
+        precision_t informationGain(size_t, size_t, size_t);
+    };
+}
+#endif