How to determine Empty matrix: 0-by-1 in a cell??

I have a cell of size 24x1. It is of the form k1 =

    [        13]
    [        13]
    [        13]
    [        13]
    [        13]
    [        13]
    [         0]
    [        12]
    [        12]
    [0x1 double]
    [        12]
    [        12]
    [        12]
    [        11]
    [        11]
    [        11]
    [        11]
    [        11]
    [        11]
    [         9]
    [0x1 double]
    [        10]
    [        10]
    [        10]

I want to detect the Empty Matrix: 0-by-1 cells in k1. For example, at k1(10), the value is [0x1 double]. I want to convert k1 into matrix and replace these empty matrices([0x1 double]) with zero. How can i do this?

Answer 1

[José-Luis]

 bla = {1:3,[],4}
 your_logical_result = cellfun(@(x) isempty(x),bla)
 bla(your_logical_result) = {0}

[Divya]

Thank you. Its working

[Jan]

Anonymous functions inside cellfun are slower than function handles. When cellfun has a corresponding built-in command (unfortunately they appear as "backward compatibility" in the docs only), they are massively faster:

cellfun(@isempty, bla);    % faster
cellfun('isempty', bla);   % fastest

[José-Luis]

Thanks, good to know. Not very intuitive if you ask me.

[Divya]

Thanks for the info