matlab按某一列排序

Excel中有按某一列排序，同时扩展到其他列，Matlab中对应的有sortrows:

The MATLAB function sortrows(A,j) sorts the rows of the matrix a based on the entries of the j-th column. For example, enter the following in MATLAB:

A = [1 2 3

　　  3 0 9

  　　6 5 4]

B = sortrows(A,2)

C = sortrows(A,3)

You will receive the following output:

B = 3 0 9

　　1 2 3

　　6 5 4

C = 1 2 3

　　 6 5 4

　　 3 0 9

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