CODEWITHSUNDEEP
c#vectormath.netmathnet-numerics
covfefe
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Reputation: 2675

How to get vector magnitude using MathNET.Numerics?

I'm trying to get the magnitude of a vector and I tried using the L2Norm() method but there was a red line under it stating that MathNet.Numerics.LinearAlgebra.Double.Vector does not contain a definition for L2Norm and no extension method L2Norm accepting a first argument of type MathNet.Numerics.LinearAlgebra.Double.Vector could be found (are you missing a using directive or an assembly reference?'

I put,

using MathNet.Numerics;
using MathNet.Numerics.LinearAlgebra;
using MathNet.Numerics.LinearAlgebra.Double;

At the top so I'm not sure why it's still showing an error. Any ideas on what the issue might be?

Upvotes: 0

Views: 2458

Answers (1)

Christoph Rüegg
Christoph Rüegg

Reputation: 4736

L2Norm is only available in v3:

using MathNet.Numerics.LinearAlgebra;
Vector<double>.Build.Random(10).L2Norm();

In v2 you can use the Norm function (which is available in v3 as well) with p=2 as argument:

using MathNet.Numerics.LinearAlgebra.Double;
using MathNet.Numerics.Distributions;
DenseVector.CreateRandom(10, new Normal()).Norm(2);

Upvotes: 1

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