Read multiple txt files and remove 2nd line with all dashes and output back to files to append _output in the filenames

I have multiple .txt files to read and want to remove the 2nd line with all dashes in all files. Then each of them should be saved with the same filename. Or appended with "_output.txt".

I Have the following codes, but it only generate files without contents. Can someone helps?

SBFsample=dir('/Users/ichen/Documents/MATLAB/SBF/*.TXT');  % Identify a directory and TXT files to be merged/processed
for i=1:length(SBFsample)
 fid=fopen(SBFsample(i).name,'r');                                         % Open each data file in turn
 fidOut=fopen(SBFsample(i).name,'output.txt','w');                        % Open an output file
 hdr = textscan(fid,'%s',1,'Delimiter','\n','Whitespace','');              % Capture the header line
 fprintf(fidOut,'%s\n',hdr{1}{:});                                         % Print header file and 
 for i=1:1, fgetl(fid); end                                                % Skip and remove the dash line remove the dash line on the original data file
 fwrite(fidOut,fread(fid,'*char'),'*char')                                 % Read remainder as char* image and echo back out
 fclose(fidOut);
 fclose(fid);                                                                % Complete reading and combining individual file ...
end                                                       % Close the output file

[per isakson]

Steps

1. Converted your code to a function. I think it's easier to debug functions than scripts and functions don't litter my base workspace.
2. Created two sample text files.
3. Run the function

Result

>> cssm
Error using fopen
Invalid permission.
Error in cssm (line 5)
        fidOut=fopen(SBFsample(ii).name,'output.txt','w');

Answer 1

[per isakson]

I run your code successfully after having replaced

fidOut=fopen(SBFsample(i).name,'output.txt','w');

by

fidOut=fopen( [SBFsample(ii).name,'_output.txt'],'w');

The code requires that the text files are in the current directory

Answer 2

[Ivy Chen]

This works out beautifully, thanks!