Swapping the columns based on matrix even length

Is there any pre-function in Matlab to change the column order below like it?

Original column orders = 1 2 3 4 5 6 7 8 9 10

Modified coulmn orders = 2 1 4 3 6 5 8 7 10 9

cell format and matrix format how can it change?

Thanks

Answer 1

[Johannes Fischer]

Assuming that there is always an even number of columns:

matrix = repmat(1:10, [3, 1]);

L = size(matrix, 2);

ind = [2:2:L; 1:2:L];

matrix_reorderedColumns = matrix(:, ind(:))

Answer 2

[madhan ravi]

No matter odd or even:

ix=(2:2:size(matrix,2)) + [0;-1];
% if > 2016b ix = bsxfun(@plus, 2:2:size(a,2), [0;-1])
Wanted = matrix(:,[ix(:);end.*(mod(end,2)~=0)])

[Rik]

Or with a few small tweaks:

N=10;%set to something odd or even to check both
matrix = repmat(1:N, [3, 1]);

ix=(2:2:(size(matrix,2)+1)) + [0;-1];
% if > 2016b ix = bsxfun(@plus, 2:2:size(a,2), [0;-1])
Wanted = matrix(:,ix(ismember(ix,1:size(matrix,2))))

[madhan ravi]

Thanks Rik :) !