Dotnet/FastRng
1
0 Fork 0
Code Issues 2 Pull Requests Packages Projects Releases 5 Wiki Activity

Use standard formula with updated parameters

Browse Source
This commit is contained in:
tsommer committed 2020-09-30 21:39:45 +02:00
1 parent 329057198d
commit 7b5727802f
1 file changed
+3 -3
Download Patch File Download Diff File Expand all files Collapse all files
FastRng/Double/Distributions/Normal.cs
+3 -3
View File
@@ -8,7 +8,7 @@ namespace FastRng.Double.Distributions
public sealed class Normal : IDistribution
{
private const double SQRT_2PI = 2.506628275;
private const double STDDEV = 0.4;
private const double STDDEV = 0.2;
private const double MEAN = 0.5;
private ShapeFitter fitter;
@@ -24,11 +24,11 @@ namespace FastRng.Double.Distributions
set
{
this.random = value;
this.fitter = new ShapeFitter(Normal.ShapeFunction, this.random, 50, 0.99);
this.fitter = new ShapeFitter(Normal.ShapeFunction, this.random, 50, 1.93);
}
}
private static double ShapeFunction(double x) => 1.0 / (STDDEV * SQRT_2PI) * Math.Exp(-Math.Pow((x - MEAN) / STDDEV, 2.0));
private static double ShapeFunction(double x) => 1.0 / (STDDEV * SQRT_2PI) * Math.Exp(-0.5 * Math.Pow((x - MEAN) / STDDEV, 2.0));
public async ValueTask<double> GetDistributedValue(CancellationToken token = default)
{