interweave

This function interweaves (alternates/overlaps) the columns of equal-sized matrices A,B,C...

Description

The first column of the output is the first column of A.
The second column of the output is the first column of B, followed by C etc.
Then the second columns of A,B,C...
The final column of the output is the final column of the last input matrix.

Example: A = ones(3); B = ones(3)*2;
C = ones(3)*3; D = interweave(A,B,C)

• MATLAB release: MATLAB 7.2 (R2006a)

[Yi Cao]

The code has a bug. If the number of rows is larger than the total number of columns of all inputs, then line 24, which uses length(input) will generate an error.

I also believe that such a task can be done in a much simpler way without the need of a loop.

[Jos x@y.z]

The fact that this function has a help section is good. However, as it is now, it errors on some input, and the same task can be accomplished by the following one-liner:

function X = fun(varargin)
X = reshape(cat(1,varargin{:})],size(varargin{1},1),[]) ;

to which you can add error checks

[Duane Hanselman]

For an alternative try the other "interlace" function on the File Exchange: File Id 10060