如何进行矩阵乘法？ [英] How to do matrix multiplication?

问题描述

如何使用c ++或c＃中的矩阵和向量？如何设置n乘m的矩阵，就像在matlab中我们说A = M * N，需要什么名称空间或库？

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?

推荐答案

希望这些链接帮助你...

矩阵分解 [ ^ ]

C#矩阵库 [ ^ ]

矩阵乘法 [ ^ ]



问候

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

Regards

请看我对这个问题的评论。



首先，矩阵乘法是相当微不足道的数学运算。请参阅，例如： http://en.wikipedia.org/wiki/Matrix_multiplication [ ^ ]。



要编码它只是根据定义行事。



现在，您可以定义适当的运算符'*'，并且使用与您的 A = M *完全相同N 样本。这就是您所需要的：

http://en.wikipedia.org/wiki/Operator_overloading [ ^ ];

C ++：

http://www.learncpp.com/cpp-教程/ 91-介绍 - 运算符重载 [ ^ ]，

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 [< a href =http://msdn.microsoft.com/en-us/library/aa288467%28v=vs.71%29.aspxtarget =_ blanktitle =New Window> ^ ] （旧但很有用）。

-SA

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

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