MATLAB Programming

Shifting and Sorting Matrices
rand('state', 0); % Initialize random number generator
A = floor(rand(6,7) * 100);
A =
95 45 92 41 13 1 84
23 1 73 89 20 74 52
60 82 17 5 19 44 20
48 44 40 35 60 93 67
89 61 93 81 27 46 83
76 79 91 0 19 41 1
To sort in ascending order based on the values in column 1, you can call
sortrows with just the one input argument:
sortrows(A)
r =
23 1 73 89 20 74 52
48 44 40 35 60 93 67
60 82 17 5 19 44 20
76 79 91 0 19 41 1
89 61 93 81 27 46 83
95 45 92 41 13 1 84
To base the sort on a column other than the first, call sortrows with a second
input argument that indicates the column number, column 4 in this case:
r = sortrows(A, 4)
r =
76 79 91 0 19 41 1
60 82 17 5 19 44 20
48 44 40 35 60 93 67
95 45 92 41 13 1 84
89 61 93 81 27 46 83
23 1 73 89 20 74 52
1-41