MATLAB: Print an array to .txt

arrayMATLABsave totxt

Didn't find a good explanation.

Suppose we have an array R=[..,..,..] How to save this single array to a .txt file? Thank you.

Best Answer

Vadim - try using fprintf. For example,

 % open your file for writing
 fid = fopen('myTextFile.txt','wt');
 % write the matrix
 myData = randi(255,10,3);
 if fid > 0
     fprintf(fid,'%d %d %d\n',myData');
     fclose(fid);
 end

The above is a very simple example that is based on the examples in the provided link so see that link for more details.

Related Solutions

MATLAB: Slash / after text .txt

Just print it before closing the file.

% open your file for writing
fid = fopen('test.txt','wt');
fprintf(fid,'super\n');
% write the matrix
myData = randi(255,10,3);
  if fid > 0
       fprintf(fid,'%d %d %d\n',myData');
  end
fprintf(fid,'/');
fclose(fid);

MATLAB: Append .txt file

To combine DateTime and data, they both need to be cell arrays, because one of them contains strings. This will work to produce a combined array

combined = [DateTime, num2cell(data)];

However, that won't solve your problem, because you can't write a cell array with dlmwrite.

One possibility is to do something like the code below, using fprintf to do the tab-separated data. Note that this code uses the original numerical data matrix, and that you may need to fiddle with the format for the numbers to get the precision you need.

outfile = 'path/output.out';
header = { ...
    '        DateTime', ...
    'data1','data2','data3','data4', ...
    'data5','data6','data7','data8', ...
    'data9','data10','data11','data12'};
fid = fopen(outfile, 'w');
if fid == -1; error('Cannot open file: %s', outfile); end
fprintf(fid, '%10s\t', header{:});
fprintf(fid, '\n');
for ii = 1:size(data, 1)
    fprintf(fid, '%s\t', DateTime{ii});
    fprintf(fid, '%10.6g\t', data(ii,:));
    fprintf(fid, '\n');
end
fclose(fid);

Best Answer

Related Solutions

MATLAB: Slash / after text .txt

MATLAB: Append .txt file

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