Reading specific lines from text file

Hi,

I have a text file (PCdata.txt) which I wish to read lines Xa, Xb and than lines Xa+14, Xb+14, Xa+14*2, Xb+14*2 … Xa+14*n, Xb+14*n until the end of the file.

Can some please explain me how to do it.

Cheers.

Answer 1

[Image Analyst]

Look up the help for fread(), fgets() or fgetl(), and fclose(). Basically, open the file, with fgets() read Xa-1 lines and ignore them, then read the Xa'th line, throw away some more lines until you get to the Xb'th line and then read that, etc.

[as hz]

Hi,

Thanks for the help.

The solution is below if someone will need it:

fid = fopen('filename','rt');
nlines = 0;
while (fgets(fid) ~= -1),
  nlines = nlines+1;
end
fclose(fid);

C = textread('filename', '%s','delimiter', '\n');
lm1=3;
lm2=5;
rowindx = 1;

while rowindx < nlines
     point1=C{lm1};
     point2=C{lm2};

     lm1=lm1+14;
     lm2=lm2+14;
     rowindx = rowindx+14;

end