Unable to perform assignment because the left and right sides have a different number of elements.

Question

Michael Eugene Carter 2022-1-27

0
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https://ww2.mathworks.cn/matlabcentral/answers/1637245-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements

编辑： KSSV 2022-1-27

I keep getting the error message above when I try to run this loop, I need to count the number of leap years there are and add up the total number of them equal to L, but when I run this loop, I only ever get L=1 from this for the answer, or it will give me the error above. It says that this error is from line 7: L(i)=L+0;

When I add (i) to the second L on the other side of the = it then tells me that the Index exceeds the number of array elements (1).

x=[1:1:2021];

L(1)=0

for i = 1:2021

if mod(x(i),400) == 0

L(i)=L+1;

elseif (mod(x(i),100) == 0 ~= mod(x(i),400))

L(i)= L+0;

else (mod(x(i),4) == 0 ~=- mod(x(i),100))

L(i) = L+1

end

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Answer 1

KSSV 2022-1-27

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https://ww2.mathworks.cn/matlabcentral/answers/1637245-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#answer_882810

编辑：KSSV 2022-1-27

在 MATLAB Online 中打开

You have not indexed L, so it was 2x1 vector and you are trying to save it into a single element which popped a error. Consider the below modified code.

x=1:1:2021;
L = zeros(2021,1) ; 
L(1)=0 ; 
for i = 2:2021
    if mod(x(i),400) == 0
        L(i)=L(i-1)+1;
    elseif (mod(x(i),100) == 0 ~= mod(x(i),400))
        L(i)= L(i-1)+0;
    else (mod(x(i),4) == 0 ~=- mod(x(i),100));
        L(i) = L(i-1)+1 ; 
    end
end