How to Fix Cannot convert data of class duration into cell array in MATLAB?

To convert a MATLAB duration array into a cell array of strings, convert the duration object to a string array first before wrapping it into a cell array, rather than passing the duration object directly into cellstr().

Solution Code:

% Create duration array [01:00:00, 02:00:00, 03:00:00]
d = hours(1:3); 

% Convert duration to string array first, then to cell array
cellArray = cellstr(string(d));
disp(cellArray);

Alternatively, if you want a custom formatted string representation:

d.Format = 'hh:mm:ss';
cellArray = cellstr(char(d));