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

Hello,

I am getting this error: Operator '.*' is not supported for operands of type 'cell'.

Here my code:

for a=1:m %d->m
    for b=1:m %d->m
        for x=1:m
            for y=1:m
                BO=BO+B(a,b,x,y).*(kron(A_ax(:,:,x,a),B_by(:,:,y,b)));  %this is the Bell operator
            end
        end
    end
end

And b is coming from other code. I am converting it:

B=T(:,:,:,:);
B=cell2mat(B);  

I really dont understand why I have this error and how I can solve it

Answer 1

[Matt J]

Well, you need to check whether B is a cell array or not (it almost certainly is). Did your call to cell2mat work?

[Gözde Üstün]

B is a cell array now

[Matt J]

Well, that explains everything. Multiplication with a cell array will not work

>> {2}.*3
Undefined operator '.*' for input arguments of type 'cell'.

[Image Analyst]

Hopefully after you read the FAQ, you'll have a better idea of what a cell array is, how it works, and how to use it: FAQ : What is a cell array? And you'll learn when to use braces, when to use parentheses, and when to use brackets.

Answer 2

[Image Analyst]

If B is a cell array, try B{a,b,x,y} instead of B(a,b,x,y) to get the contents of the cell.

See the FAQ: What_is_a_cell_array?

[Gözde Üstün]

B is a cell array because when I tried to convert it, I am getting this error:

Dimensions of arrays being concatenated are not consistent.

Error in cell2mat (line 118)

ct{mref{:}} = cat(cdim+1,c{mref{:},:});