Error of the following code : "Array indices must be positive integers or logical values."

% I have attached the file for : "ind" ; "len"; "miu".

% In the following code "line : freq(j)" I am having above mentioned error.
% Any kinds of help to solve the problem will be appreciated.

    Nvar = 65536;
    freq = zeros(Nvar,1);
    for j = 1:Nvar
        len = cell2mat(length_ijk(j));
        ind = cell2mat(index_ijk(j));
        freq(j) =  exp(-sum(miu(ind).*len));
        
    end

Answer 1

[Constantino Carlos Reyes-Aldasoro]

Not very clear, what are length_ijk and index_ijk? in the files you have added, miu has 262144 values, ind has 77 and freq has 65536.

Answer 2

[Cris LaPierre]

Not enough info to say for sure, but I suspect at some point, ind contains values that are not positive integers or logical values, causing miu(ind) to throw an error.

A = 1:3;
% works
A(2)

ans = 2

% your error
A(0)

Array indices must be positive integers or logical values.