How do i make this into code

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Dylan Bull
Dylan Bull 2021-8-18
评论： Image Analyst 2021-8-19
Hey all i am wondering how i make the below picture into actual code. Any help would be greatly appreciated.

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回答（1 个）

Image Analyst
Image Analyst 2021-8-19
Did you try using sum(), like
% Create some sample data
N = 4
r = randi(9, N, 1)
u = randi(9, N, 5)
% Now do the equations
ru = r(2:N-1) .* u(2:N-1, :)
usum = sum(ru)
delta_r = 1; % Whatever it is.
uintj = delta_r * ( (1/2) * r(1) * u(1, :) + usum + (1/2) * r(N) * u(N, :))
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Dylan Bull
Dylan Bull 2021-8-19
also when attmepting to use this i get the follow error.
Arrays have incompatible sizes for this operation.
Error in project2 (line 180)
ru = r(2:N-1) .* u(2:N-1, :)
Image Analyst
Image Analyst 2021-8-19
Well I don't know what the first 179 lines of your script do but evidently r is not a column vector.

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