dlmwrite with two row header

Hi, I am trying to use dlm write with two row header.(Datanames and headers) I made it for one row header. But For additional header it did not work? I could not write the second row header I would be pleased for any help.

% the data
     fnam='stop3.txt'; % <data file
     hdr={'Var_no','Acc','Dcc','Vcrs','Fcs','Vmax','Sure'}; % First header
     hdr2={'No','m/s2','m/s2','km/h','kg', 'm/s','s'}; % Second Header
     m=magic(7) %data

% the engine
     txt=sprintf('%s\t %s\r\t',hdr{:},hdr2{:});
     txt(end)='';
     dlmwrite(fnam,txt,'');
     dlmwrite(fnam,m,'-append','delimiter','\t');
% the result
     type(fnam)

The first row is ok. Bur for secodn row..It did not work. The data should be formatted like this as tab delimited txt file.

Var_No  Acc  Dcc  VCrs  FCs           Vmax          sure
No  m/s2  m/s2  km/h  kg            m/s          s
64  1,4  -2  40  0,145529778  11,46442127  50
50  1,2  -2  40  0,15172966  11,46151161  61
57  1,3  -2  40  0,151792581  11,49402332  60
36  1  -2  40  0,15426373  11,43154716  61

Kind Regards. Orkun ÖZENER

Answer 1

[Jan]

The creation of txt does not do, what you expect. Simply check the contents of this string:

disp(txt)

Suggestion:

   fmt = repmat('%s\t ', 1, length(hdr));
   fmt(end:end+1) = '\n';
   txt = sprintf(fmt, hdr{:},hdr2{:});

But then dlmwrite inserts an additional line break after the header. What about:

   fmt = repmat('%s\t ', 1, length(hdr));
   fmt(end:end+1) = '\n';
   fid = fopen(fnam, 'w');
   fprintf(fid, fmt, hdr{:});
   fprintf(fid, fmt, hdr2{:});
   fclose(fid);
   dlmwrite(fnam,m,'-append','delimiter','\t');

Why struggeling with the high-level and smart dlmwrite when you can write to the file directly?

[Orkun OZENER]

Dear Jan Simon,

Thanks for your answer, It fully worked. I tried it step by step. And then I understand the ('\n') addition. AT last it is working now.

For your last question. Actually the program (AVL CONCERTO) that I postprocess needs tab delimited txt for importing. So while searching for this I found dlmwrite. I did not tried or I did not now the basic way.. ıf there is and if you have time I would be happy to hear. Kind Regards. And also happy new year.

I did not tried the basic writ