MATLAB: Increasing precison using fprintf for text file

fprintf

cellArray =
    [ 334]    [38.141794059793398]    [31.983184186130529]    [1.751451095529832e+03]
    [ 352]    [38.094455446389709]    [31.940682658186898]    [1.779530219110660e+03]
    [ 404]    [38.162956465159276]    [32.019563510560964]    [1.542875077314675e+03]
    [ 414]    [38.176654734516106]    [32.068817577008474]    [1.389497182917781e+03]
    [ 476]    [38.075635175382899]    [32.027977260576755]    [1.994276513063349e+03]
    [2729]    [38.229399882994215]    [31.934421897750756]    [1.167495300253853e+03]
    [2730]    [38.205404821919039]    [31.911611428797361]    [1.291408437962644e+03]
    [2742]    [38.104502101643973]    [31.931891003528762]    [1.774978352412581e+03]
 Name           Size            Bytes  Class     Attributes
 cellArray      8x4              3840  cell      global
% I use below codes to write cellArray into txt file
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);  
  c=cellfun(@num2str,cellArray,'un',0);
   [n,m]=size(c);
form=[repmat('%s   ',1,m) ' \r\n'];
fid = fopen(fullFileName, 'w');
for k=1:n
  fprintf(fid, form, c{k,:});
end
fclose(fid);
% but data (2-3-4rd columns) are written only 4 numbers after the comma (like, 38.1418). I need to write the data into txt file without rounding.

Best Answer

If you need full precision on all numeric variables and want to use repmat to create your ‘form’ format descriptors, instead of %s, I would use %23.15E. That will print all of them out to full precision.
Related Question