MATLAB: Combining 2 vectors

matrixvectors

Sorry if bit of a silly question but how would i combine 2 vectors as below? Thanks in advance

a1 [ 1,2,3,4,5,6] a2 [ 7,8,9,10,11]

a3 = [1,2,3,4,5,6,7,8,9,10,11]

You created a1 as

a1 = [1,2,3,4,5,6];

and a2 as

a2 = [7,8,9,10,11];

So why would you not be able to create a3 as

a3 = [a1,a2];

TRY IT!

Is it sure they overlap by one line/column? Then it's just

 A=[A11 A12(:,2:end);A21(2:end,:) A22(2:end,2:end)];

Try this

A = [0 1; 2 3];
B = [4 5; 6 7];
A_ = repelem(A, size(B,1), size(B,2));
B_ = repmat(B, size(A));
C = A_ + B_;

Result

>> C
C =
     4     5     5     6
     6     7     7     8
     6     7     7     8
     8     9     9    10