I am getting an error in ismember function

Question

jana 2013-6-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/78591-i-am-getting-an-error-in-ismember-function

I wrote this code for dijiktras algorithm (with some modifications). When I use the ismember function I am getting the following error:

Index exceeds matrix dimensions

I know error could arise if either u or v exceeded length(scenarios) I tried my best to figure out the error but I couldnot. Please help me out here.

function [sp, spcost] = dijkstra(matrix_cost, s, d)
while sum(S)~=n
    candidate=[];
    for i=1:n
        if S(i)==0
            candidate=[candidate dist(i)];
        else
            candidate=[candidate inf];
        end
    end
    [u_index u]=min(candidate);
    S(u)=1;
    for i=1:n
       X = all(ismember(intersect(scenarios{u},Sc{u,i}),scenarios{i})); % I am getting an error here.
       if((dist(u)+matrix_cost(u,i))<dist(i) && X == 1)  
            dist(i)=dist(u)+matriz_costo(u,i); 
            prev(1,i) = {u};
            if counter > 1
                for j=2:counter
                    prev(counter,i) = {NaN};
                end
            end
            counter(i) = 1;
        elseif(dist(u)+matriz_costo(u,i)) == dist(i) 
            prev(counter(i)+1,i) = {u};
            counter(i) = counter(i)+1;            
        end
    end
end

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Walter Roberson 2013-6-10

duplicates http://www.mathworks.co.uk/matlabcentral/answers/78498-question-about-ismember-function

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Answer 1

Sean de Wolski 2013-6-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/78591-i-am-getting-an-error-in-ismember-function#answer_88306

在 MATLAB Online 中打开

First run:

dbstop if error

Then run your code, it will stop with the debugger at the location of the error. From here you will be able to investigate all of the variables as they were when the error occured and the bug will be obvious.

My guess is that scenarios or Sc does not have u elements.