fscanf and fgetl refuses to read my .txt file????

I have to use fscanf to read a text file into matlab, but for some reason it won't be read in. There are no error codes, it just will not read any of the data inside. I have made my own test files to be read in by the same code and it works, but with this text file it refuses to be read. The text file was originally an .xls file converted into a .txt file if that makes any difference. I am completely stumped.

Heres the code:

r=0;
x=0;

carID = fopen('car_data.txt','rt');
carRaw = fscanf(carID,'%s %f', [9 inf]);
frewind(carID);

while(x~=(-1))
    x=fgetl(carID);
    r=r+1;
end
r = r-1;

disp(['Number of rows = ' num2str(r)])

fclose(carID);

[Walter Roberson]

Would it be possible for you to attach the file for examination ?

Also please show us the output of

filename = 'car_data.txt';

[carID, msg] = fopen(filename, 'rt');
if carID < 0
    error('could not open file "%s" because "%s"', filename, msg);
end
bytes = fread(carID, '*uint8', 1, 64);
fclose(carID);

if isempty(bytes)
    fprintf('No bytes could be read at all')
else
  char(bytes)
  fprintf('%02x ', bytes);
  fprintf('\n');
end

[Mathieu NOE]

seems I have already seen this post somewhere else

why not simply use readtable ?

[Walter Roberson]

I suspect a file format problem.

Try adding a text encoding to the fopen(), such as

[carID, msg] = fopen(filename, 'rt', 'UTF-8');

[Callum Godfrey]

Unfortunately I am not allowed to use readtable, as much as I wish I could.

The output of that chunk of code gave this error:

"Error using fread

Invalid machine format.

Error in TTest (line 6)

bytes = fread(carID, '*uint8', 1, 64);"

I have updated the post to include the text file.

[Callum Godfrey]

I attempted to "fix" your code, not sure if it's been corrected correctly, but it does now run, it gives the output of:

"no bytes could be read at all"

the code change I made was to this line:

bytes = fread(carID, '*uint8', 1, 64);

and changed it to:

bytes = fread(carID,[9 inf], '*uint8', 1, 'n');

[Walter Roberson]

The correct change for the purpose of the diagnostic would be

bytes = fread(carID, [1 64], '*uint8');

For the diagnosis, I do not need the entire file, just the first 64 bytes or so.

[Callum Godfrey]

I just implemented that change and the message that is returned is still the same:

"No bytes could be read at all"

I'm not too sure why it can't read anything in the file??

[Walter Roberson]

filename = 'car_data.txt';
dinfo = dir(filename);
dinfo.bytes
fileattrib(filename)

will tell you how large the file is on disk, and tell you about its file permissions

[Callum Godfrey]

I have found the issue, doesn't make much sense, but I had the file directory wrong for the script, as when I made a new script and copied everything in it failed to open the file, but somehow the other script could open the file without actually knowing where the file was which I find abit odd.

I also feel like an idiot for not double checking if it was in the right directory in the first place like my other scripts are.