Writing string and numerical values to same line in .txt file

Hi! I need to write data from matlab workspace to a .txt file. This is not the problem. However, writing a string followed by a numerical value on the same line I've not managed to solve.

The attached file(txt-fil) depict the current .txt file with the faulty line highlited. The below code produces said file, including the faulty line, which is caused by the code entry "...'Nsecs='... and the entry below "....'Amodl='... The two code lines needs altering, but I don't know how. The end result should look like the second attachment(txt-fil_2), where Nsecs and Amodl is stacked with their corresponding numerical values.

 filename = 'modell_septic.txt';
 fid = fopen(filename,'w+');
 if fid ~= -1
    fprintf(fid, [oppirom 'Modellfil for SEPTIC' '\r\n']);
    fprintf(fid, [oppirom 'Nsecs=' ' ' '%f' 1 '\r\n']);
    fprintf(fid, [oppirom 'Amodl=' ' ' 200 '\r\n']);
    fprintf(fid,'%f %f %f %f \r\n',mat);
    fclose(fid);

Any help or ideas are appreciated. Thanks!

Answer 1

[dpb]

secs=1;     % define as variables; hardly worth the effort as fixed strings...
modl=200;
...
fprintf(fid,'%10s=%5d\n','Nsecs',1);
fprintf(fid,'%10s=%5d\n','Amodl',200);
...

Use the 't' optional flag in the fopen call to force the OS-dependent \n sequence automatically. The old Notepad is almost the only still-extant app that doesn't handle it gracefully...

fid = fopen(filename,'wt+');

I suggest first trying w/o it and with only '\n' and see if you do have an issue; if so, then use the 't' as shown...

[Andreas Burheim Volden]

Thank you!

[dpb]

No problem, you were mixing up format strings and outputs; format is always first then the outputs trail...

And, of course, I really intended

fprintf(fid,'%10s=%5d\n','Nsecs',secs);
fprintf(fid,'%10s=%5d\n','Amodl',modl);
...

with the variables in the locations for the constants, of course...