Outputting to excel...
Assuming I had a file with tons of figures in it (I think a csv would be the easiest to use), how would I go about exporting it to an xls file, and then view it in Excel? Going through the file and grabbing the necessary data wouldn't be a problem, but I'm unsure as to how I would actually write these columns to a new xls file.
Given that excel can open csv files, why would you want to do this?
Yes you can do this, but the code for writing an actual .xls file is far from trivial.
A possible Windows solution