Why "File not found"?

I am trying to follow the example of csvread here

csvread

filename = 'csvlist.dat';
M = csvread(filename)

I have csvlist.dat file save in my matlab directory.

>> M = csvread('csvlist.dat')
Error using csvread (line 35)
File not found.

I need to import my data, but which to select?

Thank you

[Walter Roberson]

What shows up for

ls *.dat

[Matlaber]

Thanks for your reply.

>> ls *.dat

csvlist.dat      

[Walter Roberson]

I wonder if there is a hidden character? Try

dinfo = dir('*.dat');
filename = {dinfo.name};
fprintf('found file named "%s"\n', filename);
fprintf('The representation of that is: \n');
disp(0 + filename);

and show us the output.

If the output is something different than

99 115 118 108 105 115 116 46 100 97 116

then you might have unusual characters in the name.

[Matlaber]

Thanks.

I found the mistake is the file name:

for CSV file

A_B_C.csv --> ABC.csv

for .dat file:

A_B_C.dat -> A_B_C.dat

I written ABC.dat that is why did not work.