how can i determine whether a matrix of any size is sorted or not (by rows and by columns)?

2012 12 6

2 个回答

更新时间：2021 8 20

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0 个投票

suppose i have A = [1 2 3 4; 5 6 7 8] is sorted

but A = [1 2 3 4; 5 6 8 7] is not

diff(A) returns "1"-s mtrix if columns are sorted

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Matt Fig 2012-12-6

编辑：Matt Fig 2012-12-6

0 个投票

See the help for the ISSORTED function.

help issorted

Azzi Abdelmalek 2012-12-6

编辑：Azzi Abdelmalek 2012-12-6

0 个投票

out1=all(arrayfun(@(x) issorted(A(x,:)),1:size(A,1)))   % by rows
out2=all(arrayfun(@(x) issorted(A(:,x)),1:size(A,2)))   % by columns

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