write_ascii

simple and elegant matlab function to quickly write large matrices to an ascii file.

Writes large matrices to an ascii file. Format is up to user. Function automatically appends to file. It is many times (10-20X) faster than dlmwrite and almost as fast as using a mex file. Uses sprintf and fwrite (opposed to fprintf).

Example usage:

M = rand(1e5,3)*1000;
tic;dlmwrite('test.txt',M,'delimiter','\t','precision','%9.3f');toc;
tic;write_ascii('test2.txt',M,'\t','%9.3f');toc;
Elapsed time is 7.446049 seconds.
Elapsed time is 0.513611 seconds.