MATLAB: Warning: Attempt to write an unsupported data type to an ASCII file. I have a data which its class cell and its attributes global. I wanna save and write this data into text but I give this warning.

save

cellArray=  '4004    638905.26736      4552506.2389'
 % cellArray            1x1               188  cell      global    
startingFolder = 'C:\Program Files\MATLAB'
 if ~exist(startingFolder, 'dir')
    startingFolder = pwd
 end
defaultFileName = fullfile(startingFolder, '*.txt')
[baseFileName, folder] = uiputfile(defaultFileName, 'Select a file')
if baseFileName == 0
   return
   end
   fullFileName = fullfile(folder, baseFileName)
   save(fullFileName, 'cellArray',  '-ASCII')

Best Answer

save -ASCII files only support pure numeric elements. Cell arrays and strings are not pure numeric elements, and reading such a file back in with load -ASCII would not result in a cell array or string.
If you want to write a string to a file,
fid = fopen(fullFileName, 'wt');
fwrite(fid, cellArray);   %cellArray is really a string confusingly named
fclose(fid)
Unless, that is, there are characters with position numbers beyond 255 to be written; writing such strings takes more work.
Related Question