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256 questions
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Filter function from coefficients in C#?

Is there a function (possibly within Math.Net) that takes an array of numerator and denominator coefficients of a digital filter and uses that to filter an input array? Something like MATLAB's filter() function or Python's scipy.signal.lfilter()…
MathuSum Mut
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How to solve non-linear equation iteratively (using Math.NET Numerics)

I have a specific non-linear equation of type: a(1+cos(b))^2 = 4x * exp(-2c*(a-x)^2) Can Math.NET Numerics solve this equation iteratively to get x when a,b and c are given? The Documentation only talks about linear equations. Thanks in advance.
selmaohneh
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The arguments type and the return type in specific methods of MathNet.Numerics

C# is a strongly-typed language, when I use MathNet.Numerics in C#, this put me to trouble. for example: when I call the PointwiseMultiply() method, the former matrix and the latter one must be the same type. That means I must convert a…
Shi Kouzhong
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How to take inverse of a matrix with mathdotnet

I get all the values of invone as NaN with this. Can't figure out what is wrong. Is there any easier way to take inverse of a matrix other than mathdotnet? It is hard to google cause when you type inverse you get the transpose codes. for(…
Alpay Aydıngüler
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Math.NET - return matrix as string by row

I'm using Math.Net (http://numerics.mathdotnet.com/) to work with matrices. I need a method that returns a matrix as a string. So if my matrix looks like this: {{1.0, 2} {3 , 4}} I need my return string to equal "1 2 3 4" Here is my code var M =…
JAck28
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Multiple dispatch behavior for operator overloads

The following gives a duplicate definition error: let (.*) (m1 : Matrix) (m2 : Matrix) = m1.Multiply(m2) let (.*) (v1 : Vector) (v2 : Vector) = v1.DotProduct(v2) Is there a way to define an operator overload…
professor bigglesworth
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Constrained Regression in R

I'm using the R type-provider from F# to access some regression related R functionality. I would like to estimate a regression when there is a constraint on the regression coefficients, so that their weighted average is 0. The weights sum to 1. The…
s952163
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find roots of cubic polynomial

I'm trying to find the roots of a cubic polynomial ax^3+bx^2+cx+d=0 using math.numerics. The package is great, but I'm struggling to get started with it. Please can someone explain how to find the roots, and a simple explanation on how to run the…
Zeus
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Converting System.Double[,] to DenseMatrix

The hessian function in Diffsharp returns something called System.Double[,]. Or if you hover on the variable it shows as a float[,]. This object seems a bit difficult to parse, I'm not sure why. This question is related but the answer doesn't seem…
professor bigglesworth
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Assignment to mutable variable interferes with type inference of otherwise valid calculation

I'm attempting some Newton Raphson updates. Here is a piece of code that compiles and runs (warning: infinite loop). let thetam = [|beta; sigSq|] |> DenseVector let mutable gm = grad yt xt betah sigSqh // returns DenseVector let hm = hess yt xt…
professor bigglesworth
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How could I determine number of iterations untill convergence of iterative solvers in Math.NET?

I am using last version of Math.NET. I tried "residualStopCriterion._lastIteration" but it only works in debug mode since it's a non-public member. I need to save this values in a file.
Amin
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Math.Net Numerics library Transpose doesn't Work

So I want to transpose a matrix that I defined with using MathNet.Numerics.LinearAlgebra.Double; var MatrixValues = new double[]{1,1,2,2,3,3} var M = Matrix.Build; var C = M.Dense(3,2,MatrixValues); var TR =…
Afshinzkh
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Where is MathML in MathNet.Symbolics for c#?

Here it is for F#; Here it is in UnitTests. So it shall be at least in F# distribution thus in .net dll. And yet it does not show itself in Assembly Explorer How to use MathNet.Symbolics MathML classes in CSharp?
DuckQueen
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Compatibility .Net 4.0 and .Net 4.5. Could not load file or Assembly 'FSharp.Core, Version=4.3.1.0.'

I want to use the library Math.NET Symbolics in the F# project. But when I run simple code: open MathNet.Symbolics open MathNet.Symbolics.Operators ... let expr = Infix.parseOrThrow("sin(x) * y") let symbols = Map.ofList [ "x", Real 2.0; "y", Real…
FoggyFinder
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What is the MathNet equivalent of MATLAB prod(v)?

I am porting some MatLab code to MathDotNet / C# What is the function to return each element in a vector multiplied together? In MatLab i can do prod(v) What is the equivalent of this in MathDotNet?
Joe Booth
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