For those who are interested:
I have put an updated tarball at
http://darrington.wattle.id.au/efficient-sheet-0.3.tar.gzI have also pushed a new branch called "sheet". To use this branch you need to copy
the above tarball directory (or symlink it) to src/ui/gui/efficient-sheet. Needless to say,
it is all highly experimental at the moment. You can expect lots of things not to work,
but it does should how a large dataset can be loaded and iterated without adding a
significant load.
All gui operations are O(1) in time and space, both in the number of variables and the
number of cases.
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