2.30 Sort a matrix row-wise using first column as key

Given

     4     2     5 
     2     7     9 
    10     1     2
 

Sort the matrix row-wise using first column as key so that the result is

     2     7     9 
     4     2     5 
    10     1     2
 

In Matlab, the sortrows() command is used. In Mathematica the Sort[] command is used as is. No need to do anything special.

Mathematica mat={{4, 2, 5}, {2, 7, 9}, {10,1, 2}}; Sort[mat]

{{2, 7, 9}, {4, 2, 5}, {10, 1, 2}}

 

Matlab A=[4 2 5; 2 7 9; 10 1 2]; sortrows(A)

2 7 9 4 2 5 10 1 2

 

Maple restart; A:=Matrix([[4,2,5],[2,7,9],[10,1,2]]); convert(A,listlist); sort(%); Matrix(%)

Matrix(3, 3, [[2, 7, 9], [4, 2, 5], [10, 1, 2]])

 

In Maple 2023 we can now do the following to get the same output

restart; A:=Matrix([[4,2,5],[2,7,9],[10,1,2]]); ArrayTools:-SortBy( A, 'column', 1 );

Matrix(3, 3, [[2, 7, 9], [4, 2, 5], [10, 1, 2]])