How to add two vectors using for loop? i have to do addition of A and B using for loop.

A = [7 21 30 40];

B = [11 4 14 6];

for i = 1:size(A,1)

for j = 1:size(B,1)

D = A + B

end

end

Answer 1

[Image Analyst]

size() for a 2-D matrix gives [rows, columns]. As you can see, you have 1 row and 4 columns. Inside the loop, you need to give everything indexes. So you'd do

A = [7 21 30 40];
B = [11 4 14 6];
[rows, columns] = size(A); % Assume B matches the number of rows and columns.
for i = 1:columns
	for j = 1:rows
		D(j, i) = A(j, i) + B(j, i)
	end
end

The above code will work for 1-D row vectors (like you have) and also for 2-D matrices.