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On Mon, Jan 5, 2015 at 3:36 PM, Charles Melice <3d@forthcad.com> wrote:
Now, I'm interested to be able to index the 'x, y, z, t' coordinates with
numeric indexes (1,2,3,4). For instance :
...
I don't see how to do that ?

Perhaps luaarray will provide some examples:

http://www.nongnu.org/techne/lua/luaarray/