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How to solve Ax=b where A is a rectangular matrix for higher order in matlab

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Boni_Pl
Boni_Pl 2020-11-16
编辑： Bruno Luong 2020-11-16
How to solve Ax=b
Where and b=

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Matt J
Matt J 2020-11-16
编辑：Matt J 2020-11-16
x=A\b
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Matt J
Matt J 2020-11-16
A\b will give an exact solution if an exact solution exists. It doesn't matter if A and b are complex.
Bruno Luong
Bruno Luong 2020-11-16
编辑：Bruno Luong 2020-11-16
In any case A\b provides x "a" least-square solution, i.e., it minimizes
norm(A*x-b).
If solution exists then the minimum is 0, meaning A*x matches exactly b (up to numerical precision error).

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