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DataPRO/ExocortexDSP/.svn/pristine/66/661a07f8fdd7ae385265a6dfeea59b17ec1984e2.svn-base

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+namespace Exocortex.DSP
+{
+    public class SimplePolynomial : Polynomial
+    {
+        public SimplePolynomial(params double[] coefficients) : base(coefficients) { }
+
+        public override double Evaluate(double value)
+        {
+            var retval = coefficients[0];
+            var f = value;
+
+            for (int i = 1; i < coefficients.Length; i++)
+            {
+                retval += coefficients[i] * f;
+                f *= value;
+            }
+            return retval;
+        }
+    }
+    public abstract class Polynomial
+    {
+        public Polynomial(params double[] coefficients)
+        {
+            this.coefficients = new double[coefficients.Length];
+
+            for (int i = 0; i < coefficients.Length; i++)
+                this.coefficients[i] = coefficients[i];
+        }
+
+        public abstract double Evaluate(double value);
+
+        protected double[] coefficients = null;
+
+        public double GetCoefficient(int index)
+        {
+            if (null == coefficients || index < 0 || index >= coefficients.Length)
+            {
+                return double.NaN;
+            }
+            return coefficients[index];
+        }
+    }
+}