Combining 2 Arrays(of equal or different dimensions)

Hello, I have hit a wall while doing my ex-homework so I can prepare for my exam.Anyways, here it goes:

Assume that you have two vectors named A2 and B2 of different lengths. Create a vector C2 that combines A2 and B2. In addition, if you run out of elements in one of the vectors, C2 contains the elements remaining from the longer vector. Example: if A2 = [1, 2, 3, 4, 5, 6] and B2 = [10, 20, 30], then C2 = [1, 10, 2, 20, 3, 30, 4, 5, 6] if A2 = [1, 2, 3] and B2 = [10, 20, 30, 40, 50], then C2 = [1, 10, 2, 20, 3, 30, 40, 50]

Also there is this second one, Write a MATLAB program that takes two 2D arrays (they may be of different dimensions) and extracts them into 1D array. Example: If A= [1 2 3; 4 5 6; 3 2 5] and B= [4 5; 1 2; 3 9] Output= [1 2 3 4 5 4 5 6 1 2 3 2 5 3 9] If A= [1 2 3; 4 5 6] and B= [4 5; 1 2; 3 9] Output= [1 2 3 4 5 4 5 6 1 2 3 9]

I would love it if someone is capable of helping me I have failed to solve it no matter how hard I tried. Union function didnt work aswell as there is duplicates in the output array. Thanks

Answer 1

[Weird Rando]

First Exercise: If we create C2 that is an array of zeros which has double the length of A2 and B2 combine. We can space A2 and B2 every 2 element apart and then remove the 0 inside the array.

% creating the C2 array of zeros which has double the length of A2 and B2 combine. 
lenA2 = length(A2)*2;
lenB2 = length(B2)*2;

C2 = zeros(1,(lenA2 + lenB2));

% place A2 and B2 in every 2nd element after the starting point
C2(1:2:lenA2) = A2;
C2(2:2:lenB2) = B2;

% removes 0 in the array
C2(C2 == 0) = [];

[Ahmed Khalifa]

Wow, thats really smart. thanks alot :) EDIT: Looking at it again I don't understand why we multiplied the length by 2

[Weird Rando]

I was lazy to find which array was longer, so I just double the length A2 and B2 just so it fits in C2. I could of done an if statement with a for loop.

[Weird Rando]

2nd part:

[Arow Acol] = size(A);
[Brow Bcol] = size(B);

temp = zeros(Arow+Brow,Acol+Bcol);

temp(1:Arow,1:Acol) = A;
temp(1:Brow,1+Acol:Bcol+Acol) = B; %offset column by Acol
Output = []; %initalise Output for the for loop

nloop = size(temp,1);

for ii = 1:nloop

      Output = [Output temp(ii,:)]

end

Output(Output == 0) = [];