Produce a matrix with the class of its elements

Input: 2-dimensional Matrix A

Output: Matrix B, having the same dimensions as A, where each element is the class of the corresponding element in A.

e.g. If A(1,1) = double, then B(1,1) = double

My code is as follows:

function B = whatclass(A)
[row,col] = size(A);
B = [];
for ii=1:row
  for jj=1:col
      B(ii,jj) = class(A(ii,jj));
  end
end
end

I am getting the error below:

Assignment has more non-singleton rhs dimensions than non-singleton subscripts

Error in integerize (line 6) B(ii,jj) = class(A(ii,jj));

Any thoughts? Help in advance.

Answer 1

[Stephen23]

Assuming that the input is a cell array (otherwise this task does not make much sense):

>> A = {double(1),single(2);uint8(3),int64(4)}
A = 
    [1]    [2]
    [3]    [4]
>> B = cellfun(@class,A,'UniformOutput',false)
B = 
    'double'    'single'
    'uint8'     'int64'

Answer 2

[Fangjun Jiang]

class(1) returns the string 'double'.

So you need to use B{ii,jj} = class(A(ii,jj))

[Andreas Georgakarakos]

Hi, thanks for your reply. Now, I am getting this error:

Cell contents assignment to a non-cell array object. Error in whatclass (line 6) B{ii,jj} = {class(A(ii,jj))};

Any ideas?

[Andreas Georgakarakos]

Solved it, thanks a lot.