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

Note: By default, the command sortrows(A) (i.e., without the j parameter) sorts by the first column of A, decides ties by the second column, decides further ties by the third column, and so on. For a three-column matrix, sortrows(A) is equivalent to sortrows(A,[1 2 3]).

出处： http://kb.iu.edu/data/afrd.html