matrix with different sizes for ranksum test

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I have two matrix of A (9*15) and B (13*16) and would like to test if there are significantly different.
B=B(:) and then use
[p, h, stats] = ranksum (A,B).
is this the right way?

Accepted Answer

Walter Roberson
Walter Roberson on 21 Aug 2020
It is the correct approach under the assumption that the structure of A and B do not matter, that the properties of the array elements are independent of position.
That is a valid assumption at times, but in other cases it is not valid at all. For example if A represents student test scores in one class, then the median for each different test could be different and so which row (or column) a value is in could be important.
Walter Roberson
Walter Roberson on 21 Aug 2020
The code you posted looks like it would be ok for that.

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