MATLAB: Converting cell array containing char to array.

arrayscell arraysMATLABmatrices

Hi,
I have a few cell arrays that contain char arrays that I need to convert to a single array. Currently the contents of the cell arrays are either numbers or [] for empty cells.
I tried cell2mat, str2num, str2double and all didn't work.
I attached one of the cell arrays.
Any help would be greatly appreciated.
Thanks