Comments (5)
I've pushed some code to https://github.com/wo80/csparse-interop. Have a nice weekend!
A simple test program could look like
namespace ConsoleApp
{
using CSparse.Double;
using CSparse.Double.Factorization;
using CSparse.Interop.Umfpack;
using System;
class TestUmfpack
{
public static void Test(SparseMatrix A)
{
int n = A.RowCount;
var x = Vector.Create(n, 1.0);
var b = Vector.Create(n, 0.0);
// Save true solution.
var s = Vector.Clone(x);
A.Multiply(x, b);
Vector.Clear(x);
using (var solver = new Umfpack(A))
{
solver.Solve(b, x);
var info = solver.Info;
Console.WriteLine("ordering: {0}", (UmfpackOrdering)info.ORDERING_USED);
Console.WriteLine("strategy: {0}", (UmfpackStrategy)info.STRATEGY_USED);
Console.WriteLine(" LU nnz: {0}", info.LU_ENTRIES);
Console.WriteLine(" rcond: {0}", info.RCOND);
Console.WriteLine("L2-Error: {0:0.00e00}", ComputeL2Error(x, s));
}
}
public static double ComputeL2Error(double[] actual, double[] expected, bool relativeError = true)
{
var e = Vector.Clone(actual);
Vector.Axpy(-1.0, expected, e);
if (relativeError)
{
return Vector.Norm(e) / Vector.Norm(expected);
}
return Vector.Norm(e);
}
}
}
from csparse.net.
here is more information about the solver
https://people.sc.fsu.edu/~jburkardt/cpp_src/umfpack/umfpack.html
also the source from SuiteSparse
https://github.com/PetterS/SuiteSparse/tree/master/UMFPACK
from csparse.net.
I already have bindings for some of the SuiteSparse solvers (Cholmod, UMFPACK, SPQR) and I still plan to publish them here on Github (already mentioned in #7 (comment)).
It will be a separate project (CSparse.Interop). I don't have a lot of time to work on it, but if you're interested (and maybe want to contribute), I could publish the code I have so far.
from csparse.net.
that would be awesome ! i am already working on implementing such algorithms into c# as the current available solutions are very complicated to build and were last updated 3~6 years ago, so i will gladly try my best to help you
from csparse.net.
I've added a repository that contains a Visual Studio solution to compile SuiteSparse:
https://github.com/wo80/vs-suitesparse
Let me know if this works for you (the only tricky part should be setting up BLAS/LAPACK). I hope I will find some time to publish the C# bindings next week.
from csparse.net.
Related Issues (20)
- Dual Licensing HOT 2
- CoordinatedStorage HOT 1
- L*D*Lt decomposition HOT 7
- CLSCompliant HOT 4
- Problem with the QR factorization HOT 4
- Nonlinear equation system HOT 13
- Solving underdetermined systems with SparseQR Factorization HOT 5
- Can I create a sparse matrix by a list of triples? HOT 4
- [Question] Adding two sparse matrices HOT 8
- Rectangular QR decomposition with MathNet.Numerics HOT 4
- this[i,j] indexing for DenseMatrix HOT 1
- A bug when converting a COO matrix into CSC matrix HOT 4
- Can I slice a CSC sparse matrix? HOT 4
- Performance Issue HOT 12
- Can I construct sparse matrix from multiple diagonals? HOT 4
- Nuget .net version compatibility HOT 2
- Set value in SparseMatrix is unable? HOT 4
- Adding Span and Memory HOT 4
- `CompressedColumnStorage<T>.Transpose` yields wrong result leading to sequential issues in `Solver`s HOT 9
- Publish symbols and source for debugging HOT 4
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from csparse.net.