Math.NET Numerics

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  1. 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 →
    • Implement the Gumbel ContinuousDistribution

      Implement the Gumbel ContinuousDistribution

      2 votes
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        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • 1 vote
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          0 comments  ·  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 →
          • 10 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 →
              • To match and provide formulas for statistical and engineering capabilities as in Excel...

                Can provide the calculation abilities of what excel inbuilt formula does as a part of framework This include formula related to statistical and engineering capabilities.

                1 vote
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                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                • Levinson Decomposition

                  Levinnson Decomposition (both symmetric and non symmetric) was available in dnAnalytics 0.2 and are highly popular in signal processing. (via alibeirami)

                  1 vote
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Matrix multiply-add, like DGEMM

                    BLAS has something like DGEMM which does X = a*A*B + b*X in one loop. This can be very fast, so allowing direct use of this would be handy.

                    2 votes
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                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                    • Add the "Periodic" to "SplineBoundaryCondition" on MathNet.Numerics.Interpolation

                      Currently, the condition Natural/ParaboricallyTerminated/FirstDerivative/SecondDerivative are on "SplineBoundaryCondition", but I'd like to add Periodic on it(I guess this is equivalent to "csape" on MATLAB).

                      1 vote
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                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                      • Add an FFTSHIFT and iFFTSHIFT on a matrix similar to MATLAB

                        Add an FFTSHIFT and iFFTSHIFT on a matrix similar to MATLAB

                        9 votes
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                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                        • Add full multigrid solver (FMG) for boundary value problems, e.g. the Poisson equation.

                          Many simluation and some image processing tasks require solving differential equations, such as heat equation and linear elliptic equation (Poisson equation).

                          In case of 2D data (images), these become partial differential equations (PDEs).

                          These can be solved in linear time using multigrid preconditioner with some relaxation scheme (Gauss-Seidel, CG, biCG).

                          Some reference, including source code, can be found in Press et al.: "Numerical Recipes, 3rd edition".

                          1 vote
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                            0 comments  ·  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 →
                            • 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 →
                              • 3 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

                                • Add support for cuda

                                  Is this possible to split the matrix multiplication algorithms to use processor and gpgpu all at the same time?

                                  It would be an amazing feature to be added.

                                  18 votes
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                                    1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                  • 8 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 →
                                      • 3 votes
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                                          1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Collection.product

                                          /// <summary>
                                          /// Returns the cartesian product of the two collections <c>c1</c>
                                          /// and <c>c2</c>.
                                          /// </summary>
                                          /// <param name="c1">Should not be null.</param>
                                          /// <param name="c2">Should not be null.</param>
                                          public static ICollection Product(ICollection c1, ICollection c2)
                                          {
                                          if(c1 == null)
                                          {
                                          throw new ArgumentNullException("c1", string.Format(Resources.ArgumentNull, "c1"));
                                          }

                                          if(c2 == null)
                                          {
                                          throw new ArgumentNullException("c2", string.Format(Resources.ArgumentNull, "c2"));
                                          }

                                          return null;
                                          }

                                          1 vote
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                                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
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                                          Math.NET Numerics

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