Genetic

Esiur.Analysis/DSP/Functions.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Esiur.Analysis.DSP
+{
+    public static class Functions
+    {
+        public static double[] ConvolveMany(params double[][] signals)
+        {
+            var rt = signals[0];
+
+            for (var i = 1; i < signals.Length; i++)
+                rt = rt.Convolve(signals[i]);
+
+            return rt;
+        }
+
+        public static double[] Convolve(this double[] signal, double[] filter)
+        {
+            var length = signal.Length + filter.Length - 1;
+            var rt = new double[length];
+
+            //for (var i = 0; i < signal.Length; i++)
+            //    for (var j = 0; j < filter.Length; j++)
+            //        rt[i + j] += signal[i] * filter[j];
+
+            for (var i = 0; i < length; i++)
+            {
+
+                for (var j = 0; j < signal.Length; j++)
+                {
+                    if (i - j >= 0 && i - j < filter.Length)
+                        rt[i] += signal[j] * filter[i - j];
+                }
+            }
+
+            return rt;
+        }
+
+        public static double[] CrossCorrelate(this double[] signal, double[] filter)
+        {
+            var length = signal.Length + filter.Length - 1;
+            var rt = new double[length];
+            for (var i = 0; i < length; i++)
+            {
+                for (var j = 0; j < signal.Length && j + i < filter.Length; j++)
+                {
+                    rt[i] = signal[j] * filter[i + j];
+                }
+            }
+
+            return rt;
+        }
+
+    }
+}