Math.NET Numerics

Welcome to our official feedback forum. Do you have an idea? Do you recognize a good idea when you see one? We want to hear from you!

Math.NET Numerics

Categories

JUMP TO ANOTHER FORUM

  1. convert laplace space functions to time domain and viceversa

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  2. I'm new to math.net, but I've found some issues with the libraries.

    One of these is related to sparsematrix and sparsecompressedrowstorage

    I've also wrote a post within the discussion forum, but I've recieved no response.

    The problem is simple: I've tried desperately to find a way to assign directly the sparse matrix in CRS format, but I've failed.
    It seems that the CSR must be constructed starting from an already existing matrix. This would imply a big performace issue and memory allocation problems.
    For istance, if one want to write a program to solve some physical problem with finite element…

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  3. 1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  4. I am a finance professional who is currently using python to run vector autogression. I would prefer to implement in a .NET stack.

    The python library is called statstools and there is a similar package in R called VAR.

    https://github.com/statsmodels/statsmodels/blob/master/docs/source/vector_ar.rst#id5

    I am happy to get involved in adding this feature but may need support.

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  5. The existing constructors of the Histogram function allow for a defined number of buckets or a defined number of buckets with a lower and upper bound. It is also useful to specifically define the buckets. For example, I need to do a histogram of a double[] array in increments of 0.5.

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  6. 1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  7. 1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  8. if it is possible, an extension method ".ToMatrix()" would be also helpful

    thank you~

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  9. Implement method:

    Matrix<T>.SetSubMatrix(int[] rowIndices, int[] columnIndices, Matrix<T> subMatrix)

    where

    int[] rowIndices
    The row indices to copy to.

    int[] columnIndices
    The column indices to copy to.

    Matrix<T> subMatrix
    The sub-matrix to copy from.

    This would enable us to set a larger number of entries at the same time.

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  10. I have done it with the Series Jv(x) in Jahnke-Emde -Lösch:
    Tables of higher Functions.
    Calculation of a given value and plotted in Visual Studio with C#.
    Important for FM-Modulation, Calculation....

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  11. When working with Deep NNs, there are a lot of "Z = WX + b" operations going on, where matrix WX has the same number of rows as matrix b. But, matrix b is a single column matrix, so we can't just the built in add operations. With broadcasting, matrix b will be treated like a matrix with the same number of columns as WX, but where each column is identical.

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  12. A common (gemeinsames) Interface for Vector and Matrix would be fine.

    This would make it easier to implement common methods be using Generics.

    Like:

    T mapInplace<T>(T t) where T : IMatrix {

    t.MapInplace(f =&gt; .... );
    
    return f;

    }

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  13. If someone does one of the inplace Methods, normally this object will be used immediately.

    Therefore it makes sense (and is the common way) to return the inplace modified object.

    So, instead of

    public void MapInplace(Func<T, T> f, Zeros zeros = Zeros.AllowSkip);

    a

    public Matrix<T> MapInplace(Func<T, T> f, Zeros zeros = Zeros.AllowSkip);

    would be good. Also for Vector, and all other inplace methods.

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  14. Support Weighted and EMA (Exponential Moving Average) in addition to existing simple moving average in MathNet.Numerics.Statistics

    1 vote
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  15. This should allow functionality similar to MATLAB:
    Suppose that A is the following matrix

    A = [ 10 20 30 40 ;

         11 21 31 41;
    
    12 22 32 42;
    13 23 33 43]

    and I = { 1, 2, 4 } and J = { 3, 4 }

    A_IJ = A[I, J]

    should return a slice of the matrix according to the indices specified:
    A_IJ = [ 30 40;

             31 41;
    
    33 43 ]

    The same idea is very useful for arrays and it should work in both directions, for example:

    A[I, J] += some3by2matrix;

    The same…

    0 votes
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  16. 0 votes
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
  17. Support Weighted and EMA (Exponential Moving Average) in addition to existing simple moving average in MathNet.Numerics.Statistics

    0 votes
    Vote

    We're glad you're here

    Please sign in to leave feedback

    Signed in as (Sign out)
    You have left! (?) (thinking…)
    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
1 2 4 Next →
  • Don't see your idea?