Add AUC computing in Experiment and store in result

src/main/RocAuc.h

@@ -0,0 +1,21 @@
+#ifndef ROCAUC_H
+#define ROCAUC_H
+#include <torch/torch.h>
+#include <vector>
+#include <string>
+#include <nlohmann/json.hpp>
+
+namespace platform {
+    using json = nlohmann::ordered_json;
+    class RocAuc {
+    public:
+        RocAuc() = default;
+        double compute(const std::vector<std::vector<double>>& y_proba, const std::vector<int>& y_test);
+        double compute(const torch::Tensor& y_proba, const torch::Tensor& y_test);
+    private:
+        double compute_common(size_t nSamples, size_t classIdx);
+        std::vector<std::pair<double, int>> scoresAndLabels;
+        std::vector<int> y_test;
+    };
+}
+#endif