MATLAB: How to add NaNs to a cell array in positions that match the positions of NaNs in a separate matrix

Question

I have a matrix (A) containing some NaNs. I also have a cell array (B) with no NaNs, containing script in every element.

Where NaNs exist in A, I also want NaNs to appear in B.

Below is my failed attempt to do this. The final line of the script results in an error: "Conversion to cell from double is not possible." Any advice would be much appreciated.

A = rand(2);                          % matrix
A(1,2) = NaN
B = {'fred'   'wilma';                % cell array
     'barney' 'betty'};
nan_locations = find(isnan(A));       % index location of NaNs in A
B(nan_locations) = NaN                % in B insert NaNs in same locations as A

Answer 1

B(isnan(A)) = {NaN}