file data error reading
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I have this dataset in a txt file.
25 0.109 1
corrupted line
20 0.096 2
100 0 3
15 0.517 3
15 0.8 5
35 1.086 4
3
40 0.934 2
3 3 3 3 3 3
35 0.109 1
22 0.100 1
21 0.100 2
16 0.600 3
17 0.850 5
32 1.080 4
45 0.950 2
37 0.110 1
I want MATLAB to read the data and skip the lines where there are errors (like line 2 and 8) and then explain in which line the error occured and what error was.
I just dont know how to do it... Help plz.
回答（1 个）
Geoff Hayes
2014-6-17
You mention that line eight should be skipped - is that because there is only one number in that line? Are valid lines only those with 3 numbers?
Once you have opened your file and ensured that the file descriptor is valid, use a while loop to iterate over each line in the file (with the condition ~feof(fid) (type help feof for details on this function). Then, for each line do something like
% get the line
line = fgetl(fid);
% read the three floats into data and get the count of the number
% of floats read
[data,count] = sscanf(line,'%f%f%f');
if count~=3
fprintf('invalid line: %s\n',line);
else
% do something with data
end
Try out the above and see what happens!
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2014-6-17
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