Distributions: fix sign of Categorical entropy #187

13 years ago · d05918402f
1 changed files with 1 additions and 1 deletions
--- a/src/Numerics/Distributions/Categorical.cs
+++ b/src/Numerics/Distributions/Categorical.cs
@ -237,7 +237,7 @@ namespace MathNet.Numerics.Distributions
        /// </summary>
        public double Entropy
        {
-            get { return _pmfNormalized.Sum(p => p*Math.Log(p)); }
+            get { return -_pmfNormalized.Sum(p => p*Math.Log(p)); }
        }

        /// <summary>