矩阵乘法问题（答的好有加分）A*B=C假设A,B,C都是方阵,已知A和C,则B=INV(A)*C,但是假设A,B,C都不是方阵,已知A和C怎样求B呢?在MATLAB里又怎样运算?假设A(4,2),B(2,5)C(4,5)

Question

矩阵乘法问题 （答的好有加分）
A*B=C假设A,B,C都是方阵,已知A和C,则B=INV(A)*C,但是假设A,B,C都不是方阵,已知A和C怎样求B呢?在MATLAB里又怎样运算?假设A(4,2),B(2,5)
C(4,5)

Answer 1

A is not necessary to be square matrix. Then there does not exist the inverse of A. However, you can use pseudo inverse instead. In MATLAB, the function is pinv(A). For example,>> a=[2 5;3 7;4 9];...