test plot is right when input output relation is quadratic. it works

src/main/java/Sample.java

@@ -15,7 +15,7 @@ public class Sample {
     private List<FreudFeature> features;
 
     public Sample(long time) {
-        this.time = time;
+        this.time = time * time;
         uidR = (int) time;
         mem = 0;
         lockHoldingTime = 0;