Add comparison to report console

src/Platform/ReportBase.cc

@@ -1,10 +1,22 @@
 #include <sstream>
 #include <locale>
+#include "Datasets.h"
 #include "ReportBase.h"
 #include "BestResult.h"
 
 
 namespace platform {
+    ReportBase::ReportBase(json data_) : margin(0.1), data(data_)
+    {
+        stringstream oss;
+        oss << "Better than ZeroR + " << setprecision(1) << fixed << margin * 100 << "%";
+        meaning = {
+            {Symbols::equal_best, "Equal to best"},
+            {Symbols::better_best, "Better than best"},
+            {Symbols::cross, "Less than or equal to ZeroR"},
+            {Symbols::upward_arrow, oss.str()}
+        };
+    }
     string ReportBase::fromVector(const string& key)
     {
         stringstream oss;
@@ -34,4 +46,30 @@ namespace platform {
         header();
         body();
     }
+    string ReportBase::compareResult(const string& dataset, double result)
+    {
+        string status = " ";
+        if (data["score_name"].get<string>() == "accuracy") {
+            auto dt = Datasets(Paths::datasets(), false);
+            dt.loadDataset(dataset);
+            auto numClasses = dt.getNClasses(dataset);
+            if (numClasses == 2) {
+                vector<int> distribution = dt.getClassesCounts(dataset);
+                double nSamples = dt.getNSamples(dataset);
+                vector<int>::iterator maxValue = max_element(distribution.begin(), distribution.end());
+                double mark = *maxValue / nSamples * (1 + margin);
+                if (mark > 1) {
+                    mark = 0.9995;
+                }
+                status = result < mark ? Symbols::cross : result > mark ? Symbols::upward_arrow : "=";
+                auto item = summary.find(status);
+                if (item != summary.end()) {
+                    summary[status]++;
+                } else {
+                    summary[status] = 1;
+                }
+            }
+        }
+        return status;
+    }
 }