MATLAB中A * x = b的A \\ b或b \\ A
[英]A\b or b\A for A*x=b in MATLAB
问题描述
A solution of A*x = b can be obtained by x = A\\b . 
可以通过x = A\\b获得A*x = b解。 But I did x = b\\A as I did not look for exact syntax. 但是我做了x = b\\A因为我没有寻找确切的语法。 I got different vectors x in with A\\b and b\\A . 我用A\\b和b\\A获得了不同的向量x 。 I understood that A\\b is more or less equivalent to inv(A)*b , but I don't understand what exactly is happening if I do b\\A . 我知道A\\b或多或少等于inv(A)*b ，但是我不明白如果我执行b\\A会发生什么。 Does anyone know about it? 有人知道吗？
1 个解决方案
解决方案1
2 已采纳 2017-11-09 00:22:13
From the MATLAB documentation: 从MATLAB文档中：
If A is a rectangular m-by-n matrix with m ~= n, and B is a matrix with m rows, then A\\B returns a least-squares solution to the system of equations A*x= B.
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