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I have coordinates of some points$(x,y)$, that I want to sort them,at the first by $y$ coordinates and second sort $x$ coordinates between those points that have equal $y$ coordinate. Is there anyone know any function in matlab about it? I examined it by $SORT$ function, but this function just sort each column of matrix.

Please help me.

Thanks.

Rosa
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1 Answers1

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sortrows should be what you are looking for.

Though you may need to swap $x$ and $y$ first, or use the optional argument to tell it which column to base the sort first.

(BTW, the kind of ordering you are looking for is called "lexicographical order"; that may help you do more searches on the internet.)

Willie Wong
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