understand if the cell is composed of all null elements

Hi! How can I understand if the cell consists of all null elements? I tried this way but it doesn't seem to work:

CC = cell([3 7]);
empty_cell = ~isempty(CC); % result 1

or

load cc.mat
empty_cell = ~isempty(CC); % result 1 ?

Answer 1

[Steven Lord]

MATLAB is returning the correct result. The cell array is not empty, its size vector does not contain a 0.

C = cell(1, 5)

C = 1×5 cell array
    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}

C{3} = 1:10

C = 1×5 cell array
    {0×0 double}    {0×0 double}    {[1 2 3 4 5 6 7 8 9 10]}    {0×0 double}    {0×0 double}

isempty(C) % false

ans = logical
   0

size(C)

ans = 1×2

1 5

The cells inside the cell array in this case are empty. One way to determine this is to use cellfun.

identifyEmptyCells = cellfun(@isempty, C)

identifyEmptyCells = 1×5 logical array
   1   1   0   1   1

Depending on what question you want to ask, passing identifyEmptyCells into the any or all functions may be your next step.

areAllTheCellsEmpty = all(identifyEmptyCells, 'all')

areAllTheCellsEmpty = logical
   0

areAnyOfTheCellsEmpty = any(identifyEmptyCells, 'all')

areAnyOfTheCellsEmpty = logical
   1