How can I change the place of two numbers randomnly in a row?

How can I change the place of two numbers randomnly in a row in a matrix? For example;

a=[1 0 0 0 0 0; 
 0 0 1 0 0 0;
 0 1 0 0 0 0;
 0 0 0 1 0 0];

and , I want to change the places of the numbers in each row. Then I want to find; this matrix:

a=[0 0 1 0 0 0; 
 0 1 0 0 0 0;
 0 0 0 0 1 0;
 0 0 0 0 0 1];

How can I write a code for this?

Answer 1

[Image Analyst]

Try this:

m = [45 49 30 47 21 15;
  0 73 15  0 27 20;
  60 52 24 78 54  0;
  75 70 57 61 80 57]
[rows, columns]=size(m);
for row = 1 : rows
  twoIndexes = randperm(columns, 2);
  index1 = twoIndexes(1);
  index2 = twoIndexes(2);
  fprintf('In row #%d, swapping column %d with column %d\n', row, index1, index2);
  [m(row, index1), m(row, index2)] = deal(m(row, index2), m(row, index1));
end
m % Echo to command window.

It will show this:

m =
    45    49    30    47    21    15
     0    73    15     0    27    20
    60    52    24    78    54     0
    75    70    57    61    80    57
In row #1, swapping column 1 with column 3
In row #2, swapping column 5 with column 3
In row #3, swapping column 1 with column 2
In row #4, swapping column 3 with column 2
m =
    30    49    45    47    21    15
     0    73    27     0    15    20
    52    60    24    78    54     0
    75    57    70    61    80    57

It does as you requested = swap two column elements in each row.

[CarenCaren]

Thanks a lot for answering. I also try this one too. It helped a lot.

[Image Analyst]

My answer swaps exactly 2 numbers like you asked for. Azzi's answer swaps them all. The whole row gets scrambled, not just two numbers like you asked for, and like your example showed.

[CarenCaren]

You're right. I checked it, this one is the exact solution that I wanted. Thanks a lot for your help.

Answer 2

[Azzi Abdelmalek]

[n,m]=size(a),
out=a(reshape(randperm(n*m),n,m))

[CarenCaren]

I only want to change the numbers in each row. For example; Let

b=[45 49 30 47 21 15;
    0 73 15  0 27 20;
   60 52 24 78 54  0;
   75 70 57 61 80 57];

And then I want to change it to this matrix below;

b=[49 45 30 47 21 15; (I changed 49 and 45 randomly)
    0 73 15  0 20 27;
   60 54 24 78 52  0;
   80 70 57 61 75 57];

[Azzi Abdelmalek]

[n,m]=size(a),
for k=1:n
 a(k,:)=a(k,randperm(m))
end

[CarenCaren]

Thanks a lot for your answer. But this one is not what I asked for.