LinearAlgebra: extensions to convert between single and double precision, real and complex vectors/matrices

src/Numerics/LinearAlgebra/MatrixExtensions.cs

@@ -0,0 +1,121 @@
+// <copyright file="MatrixExtensions.cs" company="Math.NET">
+// Math.NET Numerics, part of the Math.NET Project
+// http://numerics.mathdotnet.com
+// http://github.com/mathnet/mathnet-numerics
+// http://mathnetnumerics.codeplex.com
+//
+// Copyright (c) 2009-2015 Math.NET
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+// </copyright>
+
+namespace MathNet.Numerics.LinearAlgebra
+{
+#if NOSYSNUMERICS
+    using Complex64 = Numerics.Complex;
+#else
+    using Complex64 = System.Numerics.Complex;
+#endif
+
+    public static class MatrixExtensions
+    {
+        /// <summary>
+        /// Converts a matrix to single precision.
+        /// </summary>
+        public static Matrix<float> ToSingle(this Matrix<double> matrix)
+        {
+            return matrix.Map(x => (float)x, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a matrix to double precision.
+        /// </summary>
+        public static Matrix<double> ToDouble(this Matrix<float> matrix)
+        {
+            return matrix.Map(x => (double)x, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a matrix to single precision complex numbers.
+        /// </summary>
+        public static Matrix<Numerics.Complex32> ToComplex32(this Matrix<Complex64> matrix)
+        {
+            return matrix.Map(x => new Numerics.Complex32((float)x.Real, (float)x.Imaginary), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a matrix to double precision complex numbers.
+        /// </summary>
+        public static Matrix<Complex64> ToComplex(this Matrix<Numerics.Complex32> matrix)
+        {
+            return matrix.Map(x => new Complex64(x.Real, x.Imaginary), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a single precision complex matrix with the real parts from the given matrix.
+        /// </summary>
+        public static Matrix<Numerics.Complex32> ToComplex32(this Matrix<float> matrix)
+        {
+            return matrix.Map(x => new Numerics.Complex32(x, 0f), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a double precision complex matrix with the real parts from the given matrix.
+        /// </summary>
+        public static Matrix<Complex64> ToComplex(this Matrix<double> matrix)
+        {
+            return matrix.Map(x => new Complex64(x, 0d), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real matrix representing the real parts of a complex matrix.
+        /// </summary>
+        public static Matrix<double> Real(this Matrix<Complex64> matrix)
+        {
+            return matrix.Map(x => x.Real, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real matrix representing the real parts of a complex matrix.
+        /// </summary>
+        public static Matrix<float> Real(this Matrix<Numerics.Complex32> matrix)
+        {
+            return matrix.Map(x => x.Real, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real matrix representing the imaginary parts of a complex matrix.
+        /// </summary>
+        public static Matrix<double> Imaginary(this Matrix<Complex64> matrix)
+        {
+            return matrix.Map(x => x.Imaginary, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real matrix representing the imaginary parts of a complex matrix.
+        /// </summary>
+        public static Matrix<float> Imaginary(this Matrix<Numerics.Complex32> matrix)
+        {
+            return matrix.Map(x => x.Imaginary, Zeros.AllowSkip);
+        }
+    }
+}

src/Numerics/LinearAlgebra/VectorExtensions.cs

@@ -0,0 +1,121 @@
+// <copyright file="VectorExtensions.cs" company="Math.NET">
+// Math.NET Numerics, part of the Math.NET Project
+// http://numerics.mathdotnet.com
+// http://github.com/mathnet/mathnet-numerics
+// http://mathnetnumerics.codeplex.com
+//
+// Copyright (c) 2009-2015 Math.NET
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+// </copyright>
+
+namespace MathNet.Numerics.LinearAlgebra
+{
+#if NOSYSNUMERICS
+    using Complex64 = Numerics.Complex;
+#else
+    using Complex64 = System.Numerics.Complex;
+#endif
+
+    public static class VectorExtensions
+    {
+        /// <summary>
+        /// Converts a vector to single precision.
+        /// </summary>
+        public static Vector<float> ToSingle(this Vector<double> vector)
+        {
+            return vector.Map(x => (float)x, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a vector to double precision.
+        /// </summary>
+        public static Vector<double> ToDouble(this Vector<float> vector)
+        {
+            return vector.Map(x => (double)x, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a vector to single precision complex numbers.
+        /// </summary>
+        public static Vector<Numerics.Complex32> ToComplex32(this Vector<Complex64> vector)
+        {
+            return vector.Map(x => new Numerics.Complex32((float)x.Real, (float)x.Imaginary), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Converts a vector to double precision complex numbers.
+        /// </summary>
+        public static Vector<Complex64> ToComplex(this Vector<Numerics.Complex32> vector)
+        {
+            return vector.Map(x => new Complex64(x.Real, x.Imaginary), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a single precision complex vector with the real parts from the given vector.
+        /// </summary>
+        public static Vector<Numerics.Complex32> ToComplex32(this Vector<float> vector)
+        {
+            return vector.Map(x => new Numerics.Complex32(x, 0f), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a double precision complex vector with the real parts from the given vector.
+        /// </summary>
+        public static Vector<Complex64> ToComplex(this Vector<double> vector)
+        {
+            return vector.Map(x => new Complex64(x, 0d), Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real vector representing the real parts of a complex vector.
+        /// </summary>
+        public static Vector<double> Real(this Vector<Complex64> vector)
+        {
+            return vector.Map(x => x.Real, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real vector representing the real parts of a complex vector.
+        /// </summary>
+        public static Vector<float> Real(this Vector<Numerics.Complex32> vector)
+        {
+            return vector.Map(x => x.Real, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real vector representing the imaginary parts of a complex vector.
+        /// </summary>
+        public static Vector<double> Imaginary(this Vector<Complex64> vector)
+        {
+            return vector.Map(x => x.Imaginary, Zeros.AllowSkip);
+        }
+
+        /// <summary>
+        /// Gets a real vector representing the imaginary parts of a complex vector.
+        /// </summary>
+        public static Vector<float> Imaginary(this Vector<Numerics.Complex32> vector)
+        {
+            return vector.Map(x => x.Imaginary, Zeros.AllowSkip);
+        }
+    }
+}

src/Numerics/Numerics.csproj

@@ -106,6 +106,8 @@
     <Compile Include="LinearAlgebra\Options.cs" />
     <Compile Include="LinearAlgebra\Solvers\DelegateStopCriterion.cs" />
     <Compile Include="LinearAlgebra\CreateVector.cs" />
+    <Compile Include="LinearAlgebra\MatrixExtensions.cs" />
+    <Compile Include="LinearAlgebra\VectorExtensions.cs" />
     <Compile Include="LinearRegression\Options.cs" />
     <Compile Include="Precision.Comparison.cs" />
     <Compile Include="Precision.Equality.cs" />