How can fix this error ?

we have run this code and we have obtained this error "

Operator '==' is not supported for operands of type 'cell'.

names = {'1' '2' '3' '4' '5' '6' '7' '8' 'A' 'B' 'C'};

A1=[1 0 0 0 5 0 0 5 0 0 0; ...

0 1 0 0 0 0 5 5 0 0 0; ...

0 0 1 10 5 0 0 0 0 0 0;...

0 0 10 1 0 0 3 0 0 0 0;...

5 0 5 0 1 0 0 0 1 0 0; ...

0 0 0 0 0 1 0 5 0 1 0;...

0 5 0 3 0 0 1 0 0 0 1;...

5 5 0 0 0 5 0 1 0 0 0;...

0 0 0 0 1 0 0 0 1 0 0;...

0 0 0 0 0 1 0 0 0 1 0;... 0 0 0 0 0 0 1 0 0 0 1];

num_cars = zeros(3,3); % initialize matrix to store number of cars passing
for i=1:3 % loop through rows of adjacency matrix
    for j=1:3 % loop through columns of adjacency matrix
        if i~=j % ignore diagonal entries (no cars can pass from a node to itself)
            num_cars(i,j) = sum(names(A1(i,:)~=0)==names(A1(j,:)~=0)); % count number of cars passing between nodes i and j
        end
    end
end

This is error "

Operator '==' is not supported for operands of type 'cell'

Answer 1

[Nathan Hardenberg]

This error occurs when you want to compare to cells, which you can't do. What you probably want is to compare the contents of the cells. For this put the corresponding index after the cell:

X = {'a', 'b'};
Y = {'a', 'c'};

X{1} == Y{1}  % compare 'a' to 'a'      => works

ans = logical
   1

X{2} == Y{2}  % compare 'b' to 'c'      => works

ans = logical
   0

X == Y  % this throws the error

Operator '==' is not supported for operands of type 'cell'.