question about matrix interleavers??

how to interleave a matrix and deinterleave it?? so it gets back to its original state?

[the cyclist]

I suggest you give more detail and/or a small example of what you mean. I, for one, don't understand specifically what you mean by "interleave".

[mary]

interleaver: it rearrange or reshape the matrix deinterleaver : it restores the original arrangement of the maatrix

[Image Analyst]

That's no answer.

Answer 1

[Azzi Abdelmalek]

you can use reshape function. give an example of matrices you want to interleave

[mary]

i don't know how do interleavers work. i only know how to implement matrix transpose..

could you give any example about any type of interleavers?

[Azzi Abdelmalek]

% Example
A=[1 2 0;3 4 0;5 6 0];
B=10*A+100
% the code
Result=reshape([A(:) B(:)]',2*size(A,1), [])

http://www.peteryu.ca/tutorials/matlab/interleave_matrices

[Image Analyst]

mary, do your matrices all have the same number of rows and columns? Do you want to interleave by rows or by columns? Please give an example of the most general case.

[mary]

it has the same number of rows and columns, and i want to interleave by rows.

the only case i know is:

a=[1 1 1;2 2 2;3 3 3];

after being interleaved will be:[1 2 3;1 2 3;1 2 3]

[Azzi Abdelmalek]

This is transposition

out=a'

[mary]

and i only have one matrix that i want to change its order. i dont want to combine 2 matrices.

[Azzi Abdelmalek]

How do you want to change it?

[Azzi Abdelmalek]

There are many function to change your matrix

flipud
fliplr
rot90
circshift

[mary]

i will try these .. thank you indeed

Answer 2

[Image Analyst]

Not sure what you mean, but here's one way/interpretation:

m1 = magic(6)
m2 = ones(10, 6)
columns = size(m1, 2)
m1Rows = size(m1, 1)
m2Rows = size(m2, 1)
m3 = zeros(m1Rows+m2Rows, columns);
% Interleave.  If there's any difference in the number of rows,
% the mismatching rows will be zero.
% You could handle that differently if you want to,
% for example, just append the remaining rows
% of the taller array.
for row = 1 : max([m1Rows, m2Rows])
  m3Row = 2 * (row-1)+1;
  if row <= m1Rows
    m3(m3Row, :) = m1(row, :);
  end
  if row <= m2Rows
    m3(m3Row+1, :) = m2(row, :);
  end
end
m3