About row and column swapping in a matrix

Hi Guys. I have a question which probably could be easy or might have built in function but I kinda stuck on it. Attached is a 3x3 matrix as an image as appeared below. I want to swap the rows and columns as shown here and save each sequence of swapping. I have a very big file to handle, i have just shown a small sample here. I tried with a loop but could not get it working. I would greatly appreciate any efforts.

Thanks Rafiq

Answer 1

[Star Strider]

I would just use circshift:

A = [0 1 2; 1 1.4 2.2; 2 2.2 2.8];
B = circshift(A, [-1 -1])

B =
          1.4          2.2            1
          2.2          2.8            2
            1            2            0

[Mohammad]

Thanks Strider. I am sorry as my question was not clear. I actually want to generate all the sequences (all 9 matrices from top to end) and save each matrix in an array. Its not that I have a one 3x3 matrix (first matrix) and I want the end 3x3 matrix (end matrix) only after swapping rows and columns. I greatly appreciate your inputs !!!

[Star Strider]

You can still use circshift to do it easily.

To get the second one in the top row (that I call ‘A12’):

A12 = [circshift(A(:,1:2),[0 -1]) A(:,3)]

and so for the rest. You would have to figure out how best to code the loop, but various combinations of these maneuvers would generate all your matrices.

[Mohammad]

Thanks Strider.

[Star Strider]

My pleasure.

[Rakib Seemanto]

how can I swap 6x6 matrix middle two rows.A = [ 1 2 3;4 5 6;7 8 9;10 11 12;13 14 15;16 17 18]

The output will be:B = [ 1 2 3;4 5 6;10 11 12;7 8 9;13 14 15;16 17 18]

Answer 2

[Walter Roberson]

To swap column J with column K you would use

newArray = oldArray;
newArray(:,[K J]) = newArray(:,[J K]];

For swapping rows,

newArray([K J],:) = newArray([J K],:);

[Mohammad]

Thanks Walter. I actually used this technique and used a loop. The problem is when you swap the columns, all the columns are swapped and same with rows. If you look at my matrix, first I want to swap all the columns (top 3 matrix), then I want to swap first row with second row and swap all the columns (middle 3 matrix), and finally I want to swap row 2 with row 3 and swap all the columns again (the last three matrix). My loop is not working the way I want it. Thanks for looking into the problem. I appreciate it.