how to shuffle a 16*147 matrix?

i have a 16*147 matrix and i want to swap random rows/columns with other random rows/columns, how to do it?

Answer 1

[Image Analyst]

Use randperm()

m = reshape(1:30, 5, 6)  % Sample data
m(randperm(numel(m))) = m % Scramble/shuffle

m =
     1     6    11    16    21    26
     2     7    12    17    22    27
     3     8    13    18    23    28
     4     9    14    19    24    29
     5    10    15    20    25    30
m =
    16    18    24     7     9     8
     3    11    14    28    12    22
    27    26    10    30    25    23
    29    13    15    20     1    21
    19     6     5     4     2    17

[shashwat soni]

IT RATHER GIVES ME A 1*2352 matrix

[shashwat soni]

i want a shuffled 16*147 matrix

[Image Analyst]

It does NOT give a 1-D matrix. You might think so, because you didn't try it and I'm using linear indexing - just one index instead of two. But if you actually try it you'll see:

m = reshape(1:16*147, 16, 147)  % Create sample data
m(randperm(numel(m))) = m % Scramble/shuffle it.
whos m

The whos command, as well as the printout to the command window shows it's a 2-D matrix:

Name       Size             Bytes  Class     Attributes
m         16x147            18816  double

Linear indexing allows you to access the whole matrix instead of having to scramble rows and columns separately.

Answer 2

[Matt J]

r=randperm(16);
c=randperm(147);

newMatrix=oldMatrix(r,c);