Interpolation: clean up old overly complicated formatting

src/Numerics/Interpolation/AkimaSplineInterpolation.cs

@@ -60,9 +60,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public AkimaSplineInterpolation(
+        public AkimaSplineInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             _spline = new CubicHermiteSplineInterpolation();
             Initialize(samplePoints, sampleValues);
@@ -92,14 +90,9 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
-            double[] derivatives = EvaluateSplineDerivatives(
+            double[] derivatives = EvaluateSplineDerivatives(samplePoints, sampleValues);
-                samplePoints,
-                sampleValues);
-
             _spline.Initialize(samplePoints, sampleValues, derivatives);
         }
 
@@ -110,9 +103,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <returns>Spline Derivative Vector</returns>
-        public static double[] EvaluateSplineDerivatives(
+        public static double[] EvaluateSplineDerivatives(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == samplePoints)
             {
@@ -188,18 +179,10 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <returns>Spline Coefficient Vector</returns>
-        public static double[] EvaluateSplineCoefficients(
+        public static double[] EvaluateSplineCoefficients(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
-            double[] derivatives = EvaluateSplineDerivatives(
+            double[] derivatives = EvaluateSplineDerivatives(samplePoints, sampleValues);
-                samplePoints,
+            return CubicHermiteSplineInterpolation.EvaluateSplineCoefficients(samplePoints, sampleValues, derivatives);
-                sampleValues);
-
-            return CubicHermiteSplineInterpolation.EvaluateSplineCoefficients(
-                samplePoints,
-                sampleValues,
-                derivatives);
         }
 
         /// <summary>
@@ -213,12 +196,8 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="index2">Index of the third sample.</param>
         /// <returns>The derivative approximation.</returns>
         static double DifferentiateThreePoint(
-            IList<double> samplePoints,
+            IList<double> samplePoints, IList<double> sampleValues,
-            IList<double> sampleValues,
+            int indexT, int index0, int index1, int index2)
-            int indexT,
-            int index0,
-            int index1,
-            int index2)
         {
             double x0 = sampleValues[index0];
             double x1 = sampleValues[index1];

src/Numerics/Interpolation/BarycentricInterpolation.cs

@@ -69,10 +69,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t (no sorting assumed)</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <param name="barycentricWeights">Barycentric weights w(t)</param>
-        public BarycentricInterpolation(
+        public BarycentricInterpolation(IList<double> samplePoints, IList<double> sampleValues, IList<double> barycentricWeights)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            IList<double> barycentricWeights)
         {
             Initialize(samplePoints, sampleValues, barycentricWeights);
         }
@@ -102,10 +99,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <param name="barycentricWeights">Barycentric weights w(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues, IList<double> barycentricWeights)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            IList<double> barycentricWeights)
         {
             if (null == samplePoints)
             {

src/Numerics/Interpolation/BulirschStoerRationalInterpolation.cs

@@ -65,9 +65,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public BulirschStoerRationalInterpolation(
+        public BulirschStoerRationalInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             Initialize(samplePoints, sampleValues);
         }
@@ -96,9 +94,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == samplePoints)
             {

src/Numerics/Interpolation/CubicHermiteSplineInterpolation.cs

@@ -61,10 +61,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <param name="sampleDerivatives">Sample Derivatives x'(t)</param>
-        public CubicHermiteSplineInterpolation(
+        public CubicHermiteSplineInterpolation(IList<double> samplePoints, IList<double> sampleValues, IList<double> sampleDerivatives)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            IList<double> sampleDerivatives)
         {
             _spline = new SplineInterpolation();
             Initialize(samplePoints, sampleValues, sampleDerivatives);
@@ -95,16 +92,9 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <param name="sampleDerivatives">Sample Derivatives x'(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues, IList<double> sampleDerivatives)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            IList<double> sampleDerivatives)
         {
-            double[] coefficients = EvaluateSplineCoefficients(
+            double[] coefficients = EvaluateSplineCoefficients(samplePoints, sampleValues, sampleDerivatives);
-                samplePoints,
-                sampleValues,
-                sampleDerivatives);
-
             _spline.Initialize(samplePoints, coefficients);
         }
 
@@ -116,10 +106,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <param name="sampleDerivatives">Sample Derivatives x'(t)</param>
         /// <returns>Spline Coefficient Vector</returns>
-        public static double[] EvaluateSplineCoefficients(
+        public static double[] EvaluateSplineCoefficients(IList<double> samplePoints, IList<double> sampleValues, IList<double> sampleDerivatives)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            IList<double> sampleDerivatives)
         {
             if (null == samplePoints)
             {
@@ -151,7 +138,7 @@ namespace MathNet.Numerics.Interpolation
                 if (samplePoints[i] <= samplePoints[i - 1])
                     throw new ArgumentException(Resources.Interpolation_Initialize_SamplePointsNotStrictlyAscendingOrder, "samplePoints");
 
-            double[] coefficients = new double[4*(samplePoints.Count - 1)];
+            var coefficients = new double[4*(samplePoints.Count - 1)];
 
             for (int i = 0, j = 0; i < samplePoints.Count - 1; i++, j += 4)
             {

src/Numerics/Interpolation/CubicSplineInterpolation.cs

@@ -60,15 +60,10 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public CubicSplineInterpolation(
+        public CubicSplineInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             _spline = new CubicHermiteSplineInterpolation();
-
+            Initialize(samplePoints, sampleValues);
-            Initialize(
-                samplePoints,
-                sampleValues);
         }
 
         /// <summary>
@@ -81,22 +76,16 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="rightBoundaryCondition">Condition of the right boundary.</param>
         /// <param name="rightBoundary">Right boundary value. Ignored in the parabolic case.</param>
         public CubicSplineInterpolation(
-            IList<double> samplePoints,
+            IList<double> samplePoints, IList<double> sampleValues,
-            IList<double> sampleValues,
+            SplineBoundaryCondition leftBoundaryCondition, double leftBoundary,
-            SplineBoundaryCondition leftBoundaryCondition,
+            SplineBoundaryCondition rightBoundaryCondition, double rightBoundary)
-            double leftBoundary,
-            SplineBoundaryCondition rightBoundaryCondition,
-            double rightBoundary)
         {
             _spline = new CubicHermiteSplineInterpolation();
 
             Initialize(
-                samplePoints,
+                samplePoints, sampleValues,
-                sampleValues,
+                leftBoundaryCondition, leftBoundary,
-                leftBoundaryCondition,
+                rightBoundaryCondition, rightBoundary);
-                leftBoundary,
-                rightBoundaryCondition,
-                rightBoundary);
         }
 
         /// <summary>
@@ -123,18 +112,11 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
-            double[] derivatives = EvaluateSplineDerivatives(
+            double[] derivatives = EvaluateSplineDerivatives(samplePoints, sampleValues,
-                samplePoints,
+                SplineBoundaryCondition.SecondDerivative, 0.0,
-                sampleValues,
+                SplineBoundaryCondition.SecondDerivative, 0.0);
-                SplineBoundaryCondition.SecondDerivative,
-                0.0,
-                SplineBoundaryCondition.SecondDerivative,
-                0.0);
-
             _spline.Initialize(samplePoints, sampleValues, derivatives);
         }
 
@@ -148,21 +130,14 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="rightBoundaryCondition">Condition of the right boundary.</param>
         /// <param name="rightBoundary">Right boundary value. Ignored in the parabolic case.</param>
         public void Initialize(
-            IList<double> samplePoints,
+            IList<double> samplePoints, IList<double> sampleValues,
-            IList<double> sampleValues,
+            SplineBoundaryCondition leftBoundaryCondition, double leftBoundary,
-            SplineBoundaryCondition leftBoundaryCondition,
+            SplineBoundaryCondition rightBoundaryCondition, double rightBoundary)
-            double leftBoundary,
-            SplineBoundaryCondition rightBoundaryCondition,
-            double rightBoundary)
         {
             double[] derivatives = EvaluateSplineDerivatives(
-                samplePoints,
+                samplePoints, sampleValues,
-                sampleValues,
+                leftBoundaryCondition, leftBoundary,
-                leftBoundaryCondition,
+                rightBoundaryCondition, rightBoundary);
-                leftBoundary,
-                rightBoundaryCondition,
-                rightBoundary);
-
             _spline.Initialize(samplePoints, sampleValues, derivatives);
         }
 
@@ -178,12 +153,9 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="rightBoundary">Right boundary value. Ignored in the parabolic case.</param>
         /// <returns>Spline Derivative Vector</returns>
         public static double[] EvaluateSplineDerivatives(
-            IList<double> samplePoints,
+            IList<double> samplePoints, IList<double> sampleValues,
-            IList<double> sampleValues,
+            SplineBoundaryCondition leftBoundaryCondition, double leftBoundary,
-            SplineBoundaryCondition leftBoundaryCondition,
+            SplineBoundaryCondition rightBoundaryCondition, double rightBoundary)
-            double leftBoundary,
-            SplineBoundaryCondition rightBoundaryCondition,
-            double rightBoundary)
         {
             if (null == samplePoints)
             {
@@ -314,25 +286,15 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="rightBoundary">Right boundary value. Ignored in the parabolic case.</param>
         /// <returns>Spline Coefficient Vector</returns>
         public static double[] EvaluateSplineCoefficients(
-            IList<double> samplePoints,
+            IList<double> samplePoints, IList<double> sampleValues,
-            IList<double> sampleValues,
+            SplineBoundaryCondition leftBoundaryCondition, double leftBoundary,
-            SplineBoundaryCondition leftBoundaryCondition,
+            SplineBoundaryCondition rightBoundaryCondition, double rightBoundary)
-            double leftBoundary,
-            SplineBoundaryCondition rightBoundaryCondition,
-            double rightBoundary)
         {
             double[] derivatives = EvaluateSplineDerivatives(
-                samplePoints,
+                samplePoints, sampleValues,
-                sampleValues,
+                leftBoundaryCondition, leftBoundary,
-                leftBoundaryCondition,
+                rightBoundaryCondition, rightBoundary);
-                leftBoundary,
+            return CubicHermiteSplineInterpolation.EvaluateSplineCoefficients(samplePoints, sampleValues, derivatives);
-                rightBoundaryCondition,
-                rightBoundary);
-
-            return CubicHermiteSplineInterpolation.EvaluateSplineCoefficients(
-                samplePoints,
-                sampleValues,
-                derivatives);
         }
 
         /// <summary>
@@ -343,11 +305,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="c">The c-vector[n].</param>
         /// <param name="d">The d-vector[n], will be modified by this function.</param>
         /// <returns>The x-vector[n]</returns>
-        static double[] SolveTridiagonal(
+        static double[] SolveTridiagonal(double[] a, double[] b, double[] c, double[] d)
-            double[] a,
-            double[] b,
-            double[] c,
-            double[] d)
         {
             double[] x = new double[a.Length];
 

src/Numerics/Interpolation/EquidistantPolynomialInterpolation.cs

@@ -60,10 +60,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="leftBound">Left bound of the sample point interval.</param>
         /// <param name="rightBound">Right bound of the sample point interval.</param>
         /// <param name="sampleValues">Sample Values x(t) where t is equidistant over [a,b], i.e. x[i] = x(a+(b-a)*i/(n-1))</param>
-        public EquidistantPolynomialInterpolation(
+        public EquidistantPolynomialInterpolation(double leftBound, double rightBound, IList<double> sampleValues)
-            double leftBound,
-            double rightBound,
-            IList<double> sampleValues)
         {
             _barycentric = new BarycentricInterpolation();
             Initialize(leftBound, rightBound, sampleValues);
@@ -74,9 +71,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Equidistant Sample Points t = a+(b-a)*i/(n-1)</param>
         /// <param name="sampleValues">Sample Values x(t) where t are equidistant over [a,b], i.e. x[i] = x(a+(b-a)*i/(n-1))</param>
-        public EquidistantPolynomialInterpolation(
+        public EquidistantPolynomialInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             _barycentric = new BarycentricInterpolation();
             Initialize(samplePoints, sampleValues);
@@ -107,10 +102,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="leftBound">Left bound of the sample point interval.</param>
         /// <param name="rightBound">Right bound of the sample point interval.</param>
         /// <param name="sampleValues">Sample Values x(t) where t are equidistant over [a,b], i.e. x[i] = x(a+(b-a)*i/(n-1))</param>
-        public void Initialize(
+        public void Initialize(double leftBound, double rightBound, IList<double> sampleValues)
-            double leftBound,
-            double rightBound,
-            IList<double> sampleValues)
         {
             if (null == sampleValues)
             {
@@ -140,9 +132,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Equidistant Sample Points t = a+(b-a)*i/(n-1)</param>
         /// <param name="sampleValues">Sample Values x(t) where t are equidistant over [a,b], i.e. x[i] = x(a+(b-a)*i/(n-1))</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == sampleValues)
             {
@@ -150,7 +140,6 @@ namespace MathNet.Numerics.Interpolation
             }
 
             var weights = EvaluateBarycentricWeights(sampleValues.Count);
-
             _barycentric.Initialize(samplePoints, sampleValues, weights);
         }
 
@@ -160,8 +149,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="sampleCount">Count of Sample Values x(t).</param>
         /// <returns>Barycentric Weight Vector</returns>
-        public static double[] EvaluateBarycentricWeights(
+        public static double[] EvaluateBarycentricWeights(int sampleCount)
-            int sampleCount)
         {
             if (sampleCount < 1)
             {

src/Numerics/Interpolation/FloaterHormannRationalInterpolation.cs

@@ -59,9 +59,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public FloaterHormannRationalInterpolation(
+        public FloaterHormannRationalInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             _barycentric = new BarycentricInterpolation();
             Initialize(samplePoints, sampleValues);
@@ -76,10 +74,7 @@ namespace MathNet.Numerics.Interpolation
         /// Order of the interpolation scheme, 0 &lt;= order &lt;= N.
         /// In most cases a value between 3 and 8 gives good results.
         /// </param>
-        public FloaterHormannRationalInterpolation(
+        public FloaterHormannRationalInterpolation(IList<double> samplePoints, IList<double> sampleValues, int order)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            int order)
         {
             _barycentric = new BarycentricInterpolation();
             Initialize(samplePoints, sampleValues, order);
@@ -112,18 +107,14 @@ namespace MathNet.Numerics.Interpolation
         /// </remarks>
         /// <param name="samplePoints">Sample Points t (no sorting assumed)</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == samplePoints)
             {
                 throw new ArgumentNullException("samplePoints");
             }
 
-            double[] weights = EvaluateBarycentricWeights(
+            double[] weights = EvaluateBarycentricWeights(samplePoints, sampleValues,
-                samplePoints,
-                sampleValues,
                 Math.Min(3, samplePoints.Count - 1));
 
             _barycentric.Initialize(samplePoints, sampleValues, weights);
@@ -138,16 +129,9 @@ namespace MathNet.Numerics.Interpolation
         /// Order of the interpolation scheme, 0 &lt;= order &lt;= N.
         /// In most cases a value between 3 and 8 gives good results.
         /// </param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues, int order)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            int order)
         {
-            double[] weights = EvaluateBarycentricWeights(
+            double[] weights = EvaluateBarycentricWeights(samplePoints, sampleValues, order);
-                samplePoints,
-                sampleValues,
-                order);
-
             _barycentric.Initialize(samplePoints, sampleValues, weights);
         }
 
@@ -162,10 +146,7 @@ namespace MathNet.Numerics.Interpolation
         /// In most cases a value between 3 and 8 gives good results.
         /// </param>
         /// <returns>Barycentric Weight Vector</returns>
-        public static double[] EvaluateBarycentricWeights(
+        public static double[] EvaluateBarycentricWeights(IList<double> samplePoints, IList<double> sampleValues, int order)
-            IList<double> samplePoints,
-            IList<double> sampleValues,
-            int order)
         {
             if (null == samplePoints)
             {

src/Numerics/Interpolation/LinearSplineInterpolation.cs

@@ -60,9 +60,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public LinearSplineInterpolation(
+        public LinearSplineInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             _spline = new SplineInterpolation();
             Initialize(samplePoints, sampleValues);
@@ -92,14 +90,9 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
-            double[] coefficients = EvaluateSplineCoefficients(
+            double[] coefficients = EvaluateSplineCoefficients(samplePoints, sampleValues);
-                samplePoints,
-                sampleValues);
-
             _spline.Initialize(samplePoints, coefficients);
         }
 
@@ -110,9 +103,7 @@ namespace MathNet.Numerics.Interpolation
         /// <param name="samplePoints">Sample Points t, sorted ascending.</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
         /// <returns>Spline Coefficient Vector</returns>
-        public static double[] EvaluateSplineCoefficients(
+        public static double[] EvaluateSplineCoefficients(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == samplePoints)
             {

src/Numerics/Interpolation/NevillePolynomialInterpolation.cs

@@ -71,9 +71,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public NevillePolynomialInterpolation(
+        public NevillePolynomialInterpolation(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             Initialize(samplePoints, sampleValues);
         }
@@ -102,9 +100,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t</param>
         /// <param name="sampleValues">Sample Values x(t)</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> sampleValues)
-            IList<double> samplePoints,
-            IList<double> sampleValues)
         {
             if (null == samplePoints)
             {
@@ -141,7 +137,7 @@ namespace MathNet.Numerics.Interpolation
         /// <returns>Interpolated value x(t).</returns>
         public double Interpolate(double t)
         {
-            double[] x = new double[_values.Count];
+            var x = new double[_values.Count];
             _values.CopyTo(x, 0);
 
             for (int level = 1; level < x.Length; level++)
@@ -167,8 +163,8 @@ namespace MathNet.Numerics.Interpolation
         /// <seealso cref="DifferentiateAll(double)"/>
         public double Differentiate(double t)
         {
-            double[] x = new double[_values.Count];
+            var x = new double[_values.Count];
-            double[] dx = new double[_values.Count];
+            var dx = new double[_values.Count];
             _values.CopyTo(x, 0);
 
             for (int level = 1; level < x.Length; level++)

src/Numerics/Interpolation/SplineInterpolation.cs

@@ -69,9 +69,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t (length: N), sorted ascending.</param>
         /// <param name="splineCoefficients">Spline Coefficients (length: 4*(N-1)).</param>
-        public SplineInterpolation(
+        public SplineInterpolation(IList<double> samplePoints, IList<double> splineCoefficients)
-            IList<double> samplePoints,
-            IList<double> splineCoefficients)
         {
             Initialize(samplePoints, splineCoefficients);
         }
@@ -100,9 +98,7 @@ namespace MathNet.Numerics.Interpolation
         /// </summary>
         /// <param name="samplePoints">Sample Points t (length: N), sorted ascending.</param>
         /// <param name="splineCoefficients">Spline Coefficients (length: 4*(N-1)).</param>
-        public void Initialize(
+        public void Initialize(IList<double> samplePoints, IList<double> splineCoefficients)
-            IList<double> samplePoints,
-            IList<double> splineCoefficients)
         {
             if (null == samplePoints)
             {