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From: hafer@infbs (Udo Hafermann)
Newsgroups: comp.lang.apl
Subject: Visualization of arrays
Message-ID: <121@infbsgr.infbs>
Date: 2 Feb 89 16:38:50 GMT
Reply-To: hafer@infbsgr.UUCP (Udo Hafermann)
Organization: TU Braunschweig,Informatik,West Germany
Lines: 13

As I am working on visualiyation of APL concepts, I would like to know:
How do you "normally" visualize APL arrays?  I suspect that up to rank
3, arrays are thought of as "concrete" objects, i.e. arranged in three-
dimensional space in the natural way (unless the application implies
thinking of "vectors of tables").

Arrays of higher rank do not have any natural arrangement in space; 
does anyone nevertheless use some kind of embedding to envision the
concept of axis?  How do you try to envision the transpose operation on
arrays of rank 4 and higher?  (As an aside, does anyone *use*
4-dimensional arrays at all?

Thanks for any contributions to this mini-poll.