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sorting data in matrix

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Kieran
Kieran 2013-10-18
编辑： Andrei Bobrov 2013-10-18
say i have a matrix
a = [2 3; 1 3; 3 2; 2 2; 1 2; 3 1; 2 1; 1 1]
i would like to rearrange a such that the first column is sorted in ascending order corresponding to the number in the second column ie. this matrix should become
asorted = [1 3; 2 3; 1 2; 2 2; 3 2; 1 1; 2 1; 3 1]
how can this be done automatically

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Andrei Bobrov
Andrei Bobrov 2013-10-18
编辑：Andrei Bobrov 2013-10-18
asorted = sortrows(a,[-2 1])

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