unrecognized function or variable

Question

Kk 2022-4-20

0
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https://ww2.mathworks.cn/matlabcentral/answers/1701040-unrecognized-function-or-variable

评论： Kk 2022-4-20

Hi all,

I am trying to solve a basic vrp problem. I try to implement a new subtour constraint that I learned recently. However, I get "unrecognized function or variable" error even though I try to define. The new piece of code I added is below. I used same method for my other constraints and none of them made an error. I cannot pass the error "Unrecognized function or variable 'conss19'.". How can I overcome this problem ?

for i = n
    for j = n
        if i>=2
            if j~=i
                if j>=2
                    conss19(i,j) = (u(i)-u(j)+n*x(i,j))<=n-1;
                end
            end
        end
    end
end
vrp.Constraints.conss19 = conss19;