Why is sscanf skipping 2 columns on second line?

Hi!

I have a text file that has four numeric values on every other line and a date on every other. Sscanf auotmatically skips the date lines, just as I want it to. Howver, when it starts reading the numeric lines, on the second line it only grabs values from the first two columns(four exist altogether). All the other lines are treated correctly. What might be going on? The source file in question is attached to this message.

THanks a lot in advance!

fid2=fopen('allMeasurements.txt','at');
R=0;
D= [9 11 12];
for i = D;
    s1=num2str(i);%Next lines creat filename
    if i<10;
        s0='0';
        s1=strcat(s0,s1);
    end
    s0='000';
    s=strcat(s0,s1,'.txt');
    sd='data';
    s=strcat(sd,s);
    fid=fopen(s, 'rt');

      while fgetl(fid)~=-1;
          R=R+1;

              A = sscanf(tline,'%f', [1,4]);%The 4 columns are stored in A

              fprintf(fid2,'%f %f\n',B);
      end
      fclose(fid);
  end
  fclose(fid2);

[Guillaume]

A much simpler way to build your filename would be with just one line:

filename = sprintf('data%05d', filenumber); %filename will consist of data always followed by 5 digits padded with as many zeros as necessary
%where filenumber is your badly named i and filename is your badly named s

Use descriptive names for your variables. It makes it much easier for readers unfamiliar with your code to understand what is going on.

That part of the code:

      while fgetl(fid)~=-1;
          R=R+1;
              A = sscanf(tline,'%f', [1,4]);%The 4 columns are stored in A
              fprintf(fid2,'%f %f\n',B);
      end

makes no sense at all. It reads a line from the file and discard the content immediately, then reads floating value from a tline string that is not declared anywhere and never change.

What is the real code you're using?

[Mak]

Hi Guillaume and thanks for the tips on naming. I should have left the last line, before "end", out. But the line that starts: A =... That line produces a 1x4 matrix on each iteration, EXCEPT when it's on the second numeric line of the file(which I have attached). What I want to know is why it treats the second numeric line different to all the rest? They all seem the same.

[per isakson]

Remove the extra dot on line 4

and try

fid = fopen('data00009.txt');
cac = textscan( fid, '%*s\n%f%f%f%f', 'Delimiter','\t', 'CollectOutput',true );
fclose( fid );

>> cac
cac = 
    [60x4 double]

>> version
ans =
9.0.0.341360 (R2016a)