Interleave Write a function interleave to interleave two row arrays of equal len

Question

Interleave Write a function interleave to interleave two row arrays of equal length. For example for the row arrays arrayOne and array Two, the output row array is array Three - [arrayOne(1), arrayTwo(1), arrayOne(2) ,arrayTwo1(2),. The function should work for rows of any length. Hint: Create a new array by concatinating arrayOne and array Two (the details of what type of concatenation is needed, you need to determine), flatten the array, and to finally end up with the desired row array. Restrictions You may not use a for or a while loop. For example,: arrayone = [2, 4, 81; arrayTwo- [3, 9, 27]; will produce arrayThree =12, 3, 4, 9, 8, 27] Your Function save CReset MATLAB Documentation 1 function [ arrayThree ] = interleave( arrayone, arrayTwo ) % Your code goes here % 3 4 s end

Explanation / Answer

interleave.m------------------------------------>

function [ arrayThree ] = interleave( arrayOne,arrayTwo )
    [M,N] = size(arrayOne);
    [P,Q] = size(arrayTwo);
    if(M>1 && N>1)
        error('ArrayOne must be a vector (1xM or Mx1)');
    end
    if(P>1 && Q>1)
        error('arrayTwo must be a vector (1xM or Mx1)');
    end
    if(isempty(arrayOne) && isempty(arrayTwo))
        arrayThree = []; return;
    elseif(isempty(arrayOne))
        arrayThree = arrayTwo; return;
    elseif(isempty(arrayTwo))
        arrayThree = arrayOne; return;
    end
    if(M==1)
        colvec = false;
    else
        colvec = true;
    end
    if(length(arrayOne)<length(arrayTwo))
        tmp=arrayOne;
        arrayOne=arrayTwo;
        arrayTwo=tmp;
        swtch = true;
    else
        swtch = false;
    end
    len = length(arrayOne) + length(arrayTwo);
    arrayThree = zeros(1,len);
    if(~swtch)
        idy = 2:2:2*length(arrayTwo);
        lasty = idy(end);
        idx = 1:2:lasty;
        idx = [idx lasty+1:len];
    else
        idy = 1:2:2*length(arrayTwo);
        lasty = idy(end);
        idx = 2:2:lasty;
        idx = [idx lasty+1:len];
    end
    arrayThree(idy) = arrayTwo;
    arrayThree(idx) = arrayOne;
    if(colvec)
        arrayThree=arrayThree(:);
    end
end

Output :-

>> arrayOne=[2 4 8]

arrayOne =

     2     4     8

>> arrayTwo=[3 9 27]

arrayTwo =

     3     9    27

>> interleave(arrayOne,arrayTwo)

ans =

     2     3     4     9     8    27

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