add quad error sample

Author: asm-jaime

MLTests/PredictionCompareLearnTest.cs

@@ -0,0 +1,22 @@
+using FluentAssertions;
+using NUnit.Framework;
+
+namespace MLTests
+{
+    public class PredictionCompareLearnTest
+    {
+        [Test]
+        public void ShouldGetSimpleLearnError()
+        {
+            var weight = 0.5;
+            var input = 0.5;
+
+            var goal = 0.8;
+
+            var prediction = input * weight;
+
+            var error = Math.Round(Math.Pow(goal - prediction, 2), 2);
+            error.Should().Be(0.3);
+        }
+    }
+}