Math.NET Numerics

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  1. 7 votes
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      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
    • Allow interpolation over complex numbers

      Currently interpolation only supports real numbers. Consider also to provide special schemes like Laurent interpolation around the unit circle.

      6 votes
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        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • Optimized DenseLU solve

        /// <summary>
        /// Solves A*X=B for X using LU factorization.
        /// </summary>
        /// <param name="columnsOfB">The number of columns of B.</param>
        /// <param name="a">The square matrix A.</param>
        /// <param name="order">The order of the square matrix <paramref name="a"/>.</param>
        /// <param name="b">On entry the B matrix; on exit the X matrix.</param>
        /// <remarks>This is equivalent to the GETRF and GETRS LAPACK routines.</remarks>
        public static unsafe void LUSolveUnsafe(int columnsOfB, double[] aIn, int order, double[] bIn)
        {
        #region Initialize
        if (aIn == null)
        throw new ArgumentNullException("a");
        if (bIn == null)
        throw new ArgumentNullException("b");

        int i;
        int j;
        int k;

        double* a = stackalloc double[aIn.Length];
        double*…

        6 votes
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          under review  ·  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
        • 6 votes
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            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
          • Add a Fixed-Point Numeric Type

            A fixed-point numeric type is essential for deterministic calculations with fractional parts. This is essential for running accurate simulations across different machines with various CPUs, OSes, because the IEEE standard for floating-point math doesn't guarantee reproducibility across machines (http://stackoverflow.com/a/328651/154766).

            Authors of real-time strategy games in .NET have typically come up with their own fixed-point math class or found some work-around. There is no fixed-point type in the BCL even though the documentation for System.Decimal at some point labeled it so, erroneously.

            6 votes
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              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
            • PCG Random support

              Implement support for the PCG random routine as specified here:
              PCG, A Family of Better Random Number Generators
              http://www.pcg-random.org/

              6 votes
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                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
              • 5 votes
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                  under review  ·  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                • Introduce support for homogeneous coordinates

                  The usage of homogeneous coordinates is quite natural.in drawing software, so support for vector manipulations using homogeneous coordinates would be intersting.

                  4 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Please consider implementing excel functions PPMT,IPMT,PMT,CUMIPMT,CUMPRINC

                    These are the financial functions used by banks. The applications using math.net will be more richer if it can have below functions PPMT,IPMT,PMT,CUMIPMT,CUMPRINC

                    4 votes
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                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                    • 3 votes
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                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                      • 3 votes
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                          1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                        • add a distributed multidimensional array type (or at least matrix)

                          Languages like Fortran 2008, Julia & Spark framework have a distributed array type. This allows to describe distributed algorithms in a natural way close to the underlying mathematics instead in a convoluted way (map reduce like Hadoop). I'd like to have the same in .NET.

                          3 votes
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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Add primality test

                            Add a fast primality test, for example based on Miller-Rabin or similar efficient method.

                            3 votes
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                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • 3 votes
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                                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                              • Fix a dimensionality bug in the SparseMatrix solve method

                                I am using the solve method on a DenseMatrix and two vectors. When I try to use the same method but with a SparseMatrix, I get a dimensionality error saying that all vectors must be the same dimensions.

                                I believe the method asserts that the input vector is of the same length as the matrix's number of columns, and probably should check against the matrix's number of rows.

                                2 votes
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • Provide extremal values for interpolated splines

                                  Provide extremal points and values and thus also min/max for interpolated splines.

                                  2 votes
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                                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Add interchange/swap function to Matrix class

                                    Add interchange/swap function to Matrix class which would allow swapping two rows or columns in the matrix (i.e. m.swapRows(2,3)).

                                    2 votes
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                                      under review  ·  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Histogram constructor with buckets. Data is applied to the buckets.

                                      I need to create a histogram with buckets from another histogram and expect my data to be counted relative to those buckets.

                                      2 votes
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                                        under review  ·  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • 2 votes
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                                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →

                                          We do some computations in parallel, however, in practice parallel execution is often not very efficient (other than e.g. concurrent execution at application level). However, we should review places where parallelization would be interesting for v3

                                        • AddSubMatrix

                                          For FEM analysis the AddMatrix method is very useful. In opposite to SetMatrix this method summarize elements.

                                          2 votes
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                                            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
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                                          Math.NET Numerics

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