Interleaving arrays with different sizes

So far i have done this, and it works for arrays of the same size:

function output = interleave(x,y)

output(1:2:6)=x;

output(2:2:6)=y;

end

so if x = [[1 2 3] and y= [10 11 12]) the output is [1 10 2 11 3 12]

but how would i alter the function for arrays of differen sizes

i.e. if x= [1 2] and y [-1 -2 -3] the output is [1 -1 2 -2 -3]

[Walter Roberson]

How would you know how to de-interleave them afterwards?

[Matt Holm]

Im not sure how to de-interleave them aha

Answer 1

[Marco Morganti]

Hi Matt,

hope this still can be helpful:

function output = interleave(x,y)

lx = numel(x);
ly = numel(y);
l = lx + ly;
i = 1;
j = 1;
k = 1;
output = zeros(1,l);

while (i <= l)

    if (j <= lx)
        output(i) = x(j);
        j = j+1;
        i = i+1;
    end

    if (k <= ly)
        output(i) = y(k);
        k = k+1;
        i = i+1;
    end  
 end

This function is of course much longer than the one you suggested, however it should be able to handle more general cases.

Answer 2

[Jos (10584)]

x = 1:5
y = 10:10:30

xy = [x y]
[~, si] = sort([1:numel(x) 1:numel(y)])
result = xy(si)