Question

I have a 30000×14000 sparse matrix in MATLAB (version 7), which I need to use in another program. Calling save won’t write this as ASCII (not supported). Calling full() on this monster results in an Out of Memory error.
How do I export it?

Answer 1

I saved it as text using Java within MATLAB. MATLAB Code:

 pw=java.io.PrintWriter(java.io.FileWriter('c:\\retail.txt')); line=num2str(0:size(data,2)-1); pw.println(line); for index=1:length(data)     disp(index);     line=num2str(full(data(index,:)));     pw.println(line); end pw.flush(); pw.close(); 

Here data is an extremely large sparse matrix.