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Questions tagged [math.net]
256 questions
0
votes
1 answer
Multiple Regression with math.net
Hello I am trying to get multiple regression with math.net and I am a little confused.
var xdata = new DenseMatrix(
new double[,]{{1, 36, 66, 45, 32},
{1, 37, 68, 12, 2},
{1, 47, 64, 78, 34},
{1, 32, 53, 56,…
user1221399
- 41
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- 11
0
votes
1 answer
Build failing on sn.exe
I'm trying to build a (seemingly unmaintained) free-software project that's written in C# (Math.NET Iridium).
The build fails on this error:
Error 1
The command ""C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\bin\sn.exe" -Vr…
dharmatech
- 8,979
- 8
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- 88
0
votes
1 answer
Custom type marshalling in IronPython
I am working on a numerical program that runs in C# based on Math.NET with scripting abilities using IronPython. I'd like to have it work so that the Math.NET arrays are converted to NumPy objects as they cross between C# and Python. There is a…
John
- 791
- 1
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- 22
0
votes
1 answer
multivariate normal distribution with Math.net
I am plugging Math.net to make some sampling and I just dont get the way it is supposed to work... What am I missing here ?
let mm = Double.DenseMatrix.Identity(2)
let ida = Double.DenseMatrix.Identity(2)
let idb = …
nicolas
- 9,549
- 3
- 39
- 83
0
votes
1 answer
Notation for matrix indexing in Math .NET
When using a DenseMatrix from Math .NET, and I want to access the second column, third row, do I write matrix[1,2] or matrix[2,1] in other words, does the first index determine the row or the column?
dmi_
- 1,187
- 2
- 12
- 26
-1
votes
1 answer
Can I change a matrix in MathNet Numerics Library to an array?
I am working on a program which needs matrix operation. I decided to use Math.NET Numerics library. I have a Matrix and I want to change one of it's values, but I don't know how.
My question is, can we have a Matrix as an array?
Can we transform a…
janbazi
- 49
- 1
- 4
-1
votes
1 answer
Does Math.Net have a LogSumExp method?
I'm new to Math.NET Numerics and I'm looking for an implementation of LogSumExp, is there an existing function for that?
dontloo
- 10,067
- 4
- 29
- 50
-1
votes
1 answer
Hann window starts and ends with values that don't seem to make sense
I am playing around with mathdotnet and am experimenting with the different windows for use in FFTs. I am specifically curious about the Hann window (though i'm sure this applies to the others as well). When I generate a Hann window of, say, 2048…
Matthew Goulart
- 2,873
- 4
- 28
- 63
-2
votes
1 answer
Does Fit.Line use least squares
The method Fit.Line - what algorithm does it use to determine the parameters? Hopefully least squares.
David Thielen
- 28,723
- 34
- 119
- 193
-2
votes
1 answer
A simple Cosine similarity
Vectors contains one column, m rows : each row contains an array of n floats;
I want to have a m x n matrix, transpose it and do there product
I'm using C#
Also, I read this from official documentation…
Ania Berthelot
- 43
- 4
-2
votes
2 answers
solve an underdetermined linear equations system in c#
I need to solve an underdetermined linear equations system in c#. For example
Underdetermined linear equations system:
x + 3 = y + z
x + w = 2
Result:
x = r1
y = -r2 + r1 + 3
z = r2
w = 2 - r1
and now I initialize r1 and r2 with 3 and 4 to…
user12834642
- 7
- 3
-2
votes
1 answer
Cross correlation using Math.Net
I tried to use solution suggested in this answer:
cross-correlation using mathdotnet
but I always get maximum correlation at lag 0. My source data has definitely significant lags that happen once in a while.
When I run this in Python using Pandas…
Alex Michel
- 416
- 3
- 13
-2
votes
1 answer
Find intersection of two fit
I use CubicSpline function from math.net to fit a series of data. for example this.
double[] x8 = { 2.25, 2.65, 3.12, 3.56, 3.95, 4.32, 4.59, 4.78 };
double[] y8 = { 124, 117, 108, 95, 79, 64, 48.5, 36 };
CubicSpline CSpline =…
AfshinBrr
- 1
- 1
-2
votes
1 answer
Using dictionary object
I am developing a Calculations library in c# using Math.Net library. I have several methods in the library that would be receiving IEnumerable double list of values. I need to calculate the annual and monthly values and return those to the caller…
Tom
- 8,175
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- 267
-2
votes
1 answer
Check null or empty IEnumerable in C#
What is the best way to check null or empty for IEnumerable in C#?
What I have tried so far is
return returnList != null && returnList.Any();
but I get a message that this expression will always return true.
Full method:
public double…
Tom
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