interpolation: algorithm constructors as one line init shortcut

Signed-off-by: Christoph Ruegg <git@cdrnet.ch>

src/Managed/Interpolation/Algorithms/BarycentricInterpolation.cs

@@ -54,6 +54,27 @@ namespace MathNet.Numerics.Interpolation.Algorithms
         /// </summary>
         private IList<double> weights;
 
+        /// <summary>
+        /// Initializes a new instance of the BarycentricInterpolation class.
+        /// </summary>
+        public BarycentricInterpolation()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the BarycentricInterpolation class.
+        /// </summary>
+        /// <param name="samplePoints">Sample Points t</param>
+        /// <param name="sampleValues">Sample Values x(t)</param>
+        /// <param name="barycentricWeights">Barycentric weights w(t)</param>
+        public BarycentricInterpolation(
+            IList<double> samplePoints,
+            IList<double> sampleValues,
+            IList<double> barycentricWeights)
+        {
+            this.Initialize(samplePoints, sampleValues, barycentricWeights);
+        }
+
         /// <summary>
         /// Gets a value indicating whether the algorithm supports differentiation (interpolated derivative).
         /// </summary>

src/Managed/Interpolation/Algorithms/LinearSplineInterpolation.cs

@@ -52,6 +52,19 @@ namespace MathNet.Numerics.Interpolation.Algorithms
             this.spline = new SplineInterpolation();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the LinearSplineInterpolation class.
+        /// </summary>
+        /// <param name="samplePoints">Sample Points t</param>
+        /// <param name="sampleValues">Sample Values x(samplePoints)</param>
+        public LinearSplineInterpolation(
+            IList<double> samplePoints,
+            IList<double> sampleValues)
+        {
+            this.spline = new SplineInterpolation();
+            this.Initialize(samplePoints, sampleValues);
+        }
+
         /// <summary>
         /// Gets a value indicating whether the algorithm supports differentiation (interpolated derivative).
         /// </summary>

src/Managed/Interpolation/Algorithms/RationalPoleFreeInterpolation.cs

@@ -52,6 +52,19 @@ namespace MathNet.Numerics.Interpolation.Algorithms
             this.barycentric = new BarycentricInterpolation();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the RationalPoleFreeInterpolation class.
+        /// </summary>
+        /// <param name="samplePoints">Sample Points t</param>
+        /// <param name="sampleValues">Sample Values x(t)</param>
+        public RationalPoleFreeInterpolation(
+            IList<double> samplePoints,
+            IList<double> sampleValues)
+        {
+            this.barycentric = new BarycentricInterpolation();
+            this.Initialize(samplePoints, sampleValues);
+        }
+
         /// <summary>
         /// Gets a value indicating whether the algorithm supports differentiation (interpolated derivative).
         /// </summary>

src/Managed/Interpolation/Algorithms/SplineInterpolation.cs

@@ -54,6 +54,25 @@ namespace MathNet.Numerics.Interpolation.Algorithms
         /// </summary>
         private int sampleCount;
 
+        /// <summary>
+        /// Initializes a new instance of the SplineInterpolation class.
+        /// </summary>
+        public SplineInterpolation()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the SplineInterpolation class.
+        /// </summary>
+        /// <param name="samplePoints">Sample Points t (length: N)</param>
+        /// <param name="splineCoefficients">Spline Coefficients (length: 4*(N-1))</param>
+        public SplineInterpolation(
+            IList<double> samplePoints,
+            IList<double> splineCoefficients)
+        {
+            this.Initialize(samplePoints, splineCoefficients);
+        }
+
         /// <summary>
         /// Gets a value indicating whether the algorithm supports differentiation (interpolated derivative).
         /// </summary>