CenterSpace's NMath library for mathematical calculations on the .Net framework.
CenterSpace's NMath library for mathematical calculations on the .Net framework.
Questions tagged [nmath]
8 questions
53
votes
7 answers
C# linear algebra library
Is there stable linear algebra (more specifically, vectors, matrices, multidimensional arrays and basic operations on them) library for C#?
Search yielded a few open source libraries which are either not updated for couple of years or are in an…
ima
- 8,105
- 3
- 20
- 19
18
votes
8 answers
The speed of .NET in numerical computing
In my experience, .NET is 2 to 3 times slower than native code. (I implemented L-BFGS for multivariate optimization).
I have traced the ads on stackoverflow to
http://www.centerspace.net/products/
the speed is really amazing, the speed is close to…
Yin Zhu
- 16,980
- 13
- 75
- 117
5
votes
3 answers
C# and NMath for Computational Finance and Econometrics
I am currently (mostly) using C++ for computationally intensive econometrics in my research. I have been wanting to move to a more productive environment. D sounds promising, but perhaps not mature enough for me to be fully productive currently. I…
TJB
- 3,493
- 4
- 23
- 20
2
votes
1 answer
Weird NullReferenceException in third party dll: C#
I have a strange error, which has started suddenly and which is driving me crazy. In my C# application, I am doing some heavy mathematical calculations and for that purpose, I am using CenterSpace's NMath library. Recently, when I started my…
Ufuk Can Bicici
- 3,589
- 4
- 28
- 57
1
vote
4 answers
C# Nmath to Python SciPy
I need to port some functions from C# to Python, but i can't implement next code right:
[SqlFunction(IsDeterministic = true, DataAccess = DataAccessKind.None)]
public static SqlDouble LogNormDist(double probability, double mean, double stddev)
{
…
Ivan
- 45
- 6
0
votes
1 answer
Fast image gamma correction
I am doing a gamma correction on an image of dimensions 5000x3000x3.
The formula is
value ^ (1 / gamma)
for RGB values from 0.0 to 1.0
My input gamma values range from 0.0 to 10.0 while gamma = 0.0 always outputs 0.0.
The trouble is that the…
tde
- 150
- 13
0
votes
1 answer
NMath/SolverFoundation claims non-convex model, despite being solvable by Matlab's "quadprog"
I have a quadratic programming problem defined by the Hessian H and the vector c. This problem is in a reference solved using Matlab's quadprog function like that
result = quadprog(H, c, [], [], [], [], lb, ub, init, opts);
lb and ub are vectors of…
Jens
- 6,275
- 2
- 25
- 51
0
votes
1 answer
NMath IIS access denied
I have tried using the NMath library on a
ASP.NET 4 web application hosted in IIS. While it works perfectly o the development machine, on the server it throws this exception:
Unable to load DLL 'nmath_native_x86.dll': Access is denied.
(Exception…
Andr
- 617
- 2
- 9
- 24