Read out a textfile -> search for special characters and save the value after it -> and save them to the corresponding rows.

Hey guys i have a problem. i have a file which looks like the following one. Here i read out the two rows for each measurement. In this case I have 3. That works perfectly for me. But i also need the time which is written like "t = 0s". so for each measurement in this file the time should be saved with the corresponding two rows.

My File looks like this:

       06.12.2099 13:50:37
  502C43 ZU152323
  Radial
f  acceleration
b  kg
  Example value
1/3  t = 0 s
+0.0000e+00  +1.4013e-03
+1.4648e+02  +2.6760e-05
+2.9297e+00  +2.1846e-06
+4.3945e+04  +1.5014e-10
+5.8594e+00  +7.3407e-40
+7.3242e+06  +6.7897e-06
2/3  t = 0.682667 s
+0.0000e+00  +1.4013e-03
+1.4648e+02  +2.6760e-05
+2.9297e+00  +2.1846e-06
+4.3945e+04  +1.5014e-10
+5.8594e+00  +7.3407e-40
+7.3242e+06  +6.7897e-06
3/3  t = 0.682667 s
+0.0000e+00  +1.4013e-03
+1.4648e+02  +2.6760e-05
+2.9297e+00  +2.1846e-06
+4.3945e+04  +1.5014e-10
+5.8594e+00  +7.3407e-40
+7.3242e+06  +6.7897e-06

And i read the two value columns like this:

 fmt = '%f %f';
fid=fopen('Example.txt,'r');
k = 1;
while (~feof(fid))
    k = k+1;
    c(k-1,1) = textscan(fid,fmt,'collectoutput',true,'HeaderLines',7);
end
fid=fclose(fid);

This works fine and he stores me the Values for each time separately. But I need also the time value after "t = ". And it should be saved in my cell also. at the moment i get a 3x1 cell (in this case).

Thank you in advance.

Answer 1

[Bob Thompson]

Generally I use fgetl() to extract data from a mixed string and number line. It's not the most efficient I'm sure, but it has been working for me.

while ~isnumeric(line)
 line = fgetl(fid);
 count = count + 1;
 if strcmp(line(8:10),'t =') == 1;
  timestamp = str2num(line(12:end)); % You're going to have to mess with this
                                     % because of the 's' at the end.
 end
end

This is by no means a perfect setup, but it should give you an idea of the application.