Need to Remove Headers from Large file that wont open in Notepad

Hey! I am new to Matlab and wanting to remove the header names on the file. Usually I would just save as a txt file and delete headers from this file and resave. However, the file is to large to open in Notepad. I want to remove the headers so when when I 'writetable' and save as a txt file there is no headers just three columns with data. Any help is much appreciated! Thank you!

[dpb]

You don't need to do anything to the input file; you can choose to read or not read the headerline when you read the data in and to write or not write the header with writetable all in MATLAB.

Answer 1

[Image Analyst]

Try this. Though I didn't test it so be careful.

fullInputFileName = fullfilt(pwd, 'blah.txt')
fullOutputFileName = fullfilt(pwd, 'blah.tmp')
if ~isfile(fullInputFileName)
	errorMessage = sprintf('File not found:\n%s', fullfileName);
	uiwait(errordlg(errorMessage));
	return;
end
% Open the input file for reading in text mode.
fileIDIn = fopen(fullInputFileName, 'rt');
% Open the output file for writing in text mode.
fileIDOut = fopen(fullInputFileName, 'wt');
% Read the first line of the file.
textLine = fgetl(fileIDIn);
lineCounter = 1;
while ischar(textLine)
	% Print out what line we're operating on.
	fprintf('%s\n', textLine);
	if lineCounter > 1
		% Write second line on down...
		fprintf(fileIDOut, '%s\n', textLine);
	end
	% Read the next line.
	textLine = fgetl(fileIDIn);
	lineCounter = lineCounter + 1;
end
% All done reading all lines, so close the file.
fclose(fileIDIn);
fclose(fileIDOut);
% Make a copy of the original file as *.bak for safety
backupFileName = strrep(fullInputFileName, '.txt', '.bak');
copyfile(fullInputFileName, backupFileName)
% Delete the original file
recycle on; % Delete to recycle bin for safety
delete(fullInputFileName);
% Rename the output file to the input file.
movefile(fullOutputFileName, fullInputFileName);

For safety I make a backup copy of the input file, and when I delete it (so I can overwrite it with the new headerless file) I put it in the recycle bin. Change .txt to .csv if it's a csv file.