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

Question

KAPIL JADHAV 2019-12-25

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https://ww2.mathworks.cn/matlabcentral/answers/498039-how-to-add-two-vectors-using-for-loop-i-have-to-do-addition-of-a-and-b-using-for-loop

回答： Image Analyst 2019-12-25

采纳的回答： Image Analyst

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

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Answer 1

Image Analyst 2019-12-25

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https://ww2.mathworks.cn/matlabcentral/answers/498039-how-to-add-two-vectors-using-for-loop-i-have-to-do-addition-of-a-and-b-using-for-loop#answer_407710

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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