Check if all elements of cell array are equal to a certain value?

Hello,

I have been trying find a way to check if all the elements of my cell array are equal to certain value.

I need help on how someone can perform this task.

[Philipp]

If the value does not matter you can use unique and test if the number of elements in the result is 1

Answer 1

[Ran Yang]

If your cell array only contains numbers, then you should convert it to a regular array using cell2mat, then test equality using ==.

x = {2 5; 3 5}; % example cell array
y = cell2mat(x);

all(y == 5, 'all') % check if all entries are 5

[Thadeus]

Thanks alot

Answer 2

[Praveen Reddy]

Hi Thadeus,

I understand that you want to compare all the values of a cell array against some value. You can use “isequal” function to achieve this. First check if all the cell array values are equal and then compare any of the cell array value against the desired value.

A = repmat({10},1,9);
B = {[10,10,1],[10,10,1],[10,10,1]};
logicalVal1=(isequal(A{:}) && A{1}==10); % logicalValue outputs to true
logicalVal2=(isequal(B{:}) && isequal(B{1},[10,10,1]));% logicalValue outputs to true
logicalVal3=(isequal(B{:}) && isequal(B{1},[10,0,1]));% logicalValue outputs to false

To know more about “isequal” function, please refer to the following MATLAB documentation:

https://www.mathworks.com/help/matlab/ref/isequal.html

[Thadeus]

Noted