How to do matrix multiplication?

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How to work with matrices and vectors in c++ or c#? How to set matrices of n by m, simply as in matlab that we say A=M*N, what are the needed namespaces or libraries?

Posted 12-Sep-14 3:45am

ARMS_DEIR

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Christian Amado 12-Sep-14 9:51am

There are many articles around the net. Just search on Google.

Sergey Alexandrovich Kryukov 12-Sep-14 22:19pm

Matrix multiplication is trivial, found in any relevant mathematics textbook. If you just act by definition, you can really easily define appropriate operators in both C++ and C#.
—SA

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Christian Amado · Accepted Answer · 2014-09-12T03:50:00

Solution 1

Hope these links helps you...
Matrix Decomposition[^]
C# Matrix Library[^]
Matrix multiplication[^]

Regards

Posted 12-Sep-14 3:50am

Christian Amado

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Matt T Heffron 12-Sep-14 12:24pm

See also: Math.Net Numerics which is Open Source (MIT/X11 License)

Sergey Alexandrovich Kryukov · Accepted Answer · 2014-09-12T16:28:00

Please see my comment to the question.

First, matrix multiplication is quite a trivial mathematical operation. Please see, for example: http://en.wikipedia.org/wiki/Matrix_multiplication[^].

To code it, just act by definition.

Now, you can define appropriate operator '*' and use is exactly like in your A=M*N sample. This is all you need:
http://en.wikipedia.org/wiki/Operator_overloading[^];
C++:
http://www.learncpp.com/cpp-tutorial/91-introduction-to-operator-overloading[^],
http://www.learncpp.com/cpp-tutorial/92-overloading-the-arithmetic-operators[^],
http://en.wikibooks.org/wiki/C++_Programming/Operators/Operator_Overloading[^],
C#:
http://msdn.microsoft.com/en-us/library/8edha89s.aspx[^],
http://msdn.microsoft.com/en-us/library/aa288467%28v=vs.71%29.aspx[^] (old but quite usable).

—SA