Reset() capability for Stats.

Author: PFalkowski

OnTheFlyStats.Test/StatsTest.cs

@@ -382,5 +382,50 @@ Variance                        2
             // Assert
             Assert.Equal(expected, prettyPrinted);
         }
+
+        [Fact]
+        public void Reset_ShouldSetAllValuesToInitialState()
+        {
+            // Arrange
+            var stats = new Stats(new[] { 1.0, 2.0, 3.0, 4.0, 5.0 });
+
+            // Act
+            stats.Reset();
+
+            // Assert
+            Assert.Equal(0, stats.Count);
+            Assert.Equal(0, stats.Sum);
+            Assert.Equal(0, stats.LogSum);
+            Assert.Equal(0, stats.Mean);
+            Assert.Equal(0, stats.SquareMean);
+            Assert.True(double.IsNaN(stats.Min));
+            Assert.True(double.IsNaN(stats.Max));
+            Assert.True(double.IsNaN(stats.Variance));
+            Assert.True(double.IsNaN(stats.StandardDeviation));
+            Assert.True(double.IsNaN(stats.PopulationVariance));
+            Assert.True(double.IsNaN(stats.PopulationStandardDeviation));
+            Assert.True(double.IsNaN(stats.GeometricAverage));
+            Assert.True(double.IsNaN(stats.RootMeanSquare));
+            Assert.True(double.IsNaN(stats.StandardError));
+        }
+
+        [Fact]
+        public void Reset_ShouldAllowNewUpdatesAfterReset()
+        {
+            // Arrange
+            var stats = new Stats(new[] { 1.0, 2.0, 3.0 });
+
+            // Act
+            stats.Reset();
+            stats.Update(10.0);
+            stats.Update(20.0);
+
+            // Assert
+            Assert.Equal(2, stats.Count);
+            Assert.Equal(30.0, stats.Sum);
+            Assert.Equal(15.0, stats.Mean);
+            Assert.Equal(10.0, stats.Min);
+            Assert.Equal(20.0, stats.Max);
+        }
     }
 }

OnTheFlyStats/IStats.cs

@@ -22,6 +22,7 @@ public interface IStats<TT> where TT : IConvertible
         TT StandardScore(TT value);
         TT Zscore(TT sampleMean);
         TT Normalize(TT value);
+        void Reset();
 
         string PrettyPrint(string title = "Descriptive statistics calculation result", int lineLength = 60);
     }

OnTheFlyStats/OnTheFlyStats.csproj

@@ -13,8 +13,8 @@
     <PackageProjectUrl>https://github.com/PFalkowski/OnTheFlyStats</PackageProjectUrl>
     <RepositoryUrl>https://github.com/PFalkowski/OnTheFlyStats</RepositoryUrl>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Version>6.2.1</Version>
-    <PackageReleaseNotes>Fix Update&lt;TT&gt; method in Stats class to use potentially overriden method Update(), not updateInternal, which resulted in InternalSample not beeing updated for Samples.</PackageReleaseNotes>
+    <Version>7.0.0</Version>
+    <PackageReleaseNotes>Reset() capability for Stats.</PackageReleaseNotes>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <UserSecretsId>21a6ced2-bed4-4e99-8fe4-0176b289630f</UserSecretsId>
   </PropertyGroup>

OnTheFlyStats/Stats.cs

@@ -209,6 +209,18 @@ public double Normalize(double value)
             return scaleMin + value * (scaleMax - scaleMin);
         }
 
+        public void Reset()
+        {
+            Count = 0;
+            Sum = 0;
+            LogSum = 0;
+            RawVariance = 0;
+            Mean = 0;
+            SquareMean = 0;
+            Min = double.NaN;
+            Max = double.NaN;
+        }
+
         public override string ToString()
         {
             var numericFormat = new InvariantCultureRoundingFormat();