What are the differences between numpy arrays and matrices Which one should I use

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What are each's advantages and drawbacks?

I've noticed that either one may, if necessary, take the place of the other, so should I use both or should I stay with just one of them?

Will the program's format affect my decision? There are a lot of matrices because I'm using Numpy to perform some machine learning, but there are also a lot of vectors (arrays).
Aug 8 in Python by krishna
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