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From: vifl@hou2f.UUCP (M.MEKETON)
Newsgroups: net.lang.apl
Subject: More APL extensions
Message-ID: <207@hou2f.UUCP>
Date: Tue, 1-May-84 11:39:25 EDT
Article-I.D.: hou2f.207
Posted: Tue May  1 11:39:25 1984
Date-Received: Wed, 2-May-84 04:43:35 EDT
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 29

Adding extensions to APL is always a fun topic.  One extension I wish APL
had was to extend dyadic operators to work with matrices in one argument
and vectors in another argument:

      A #is 1 2 3
      B #is 3 4 #reshape 10 11 12 13 14 15 16 17 18 19 20 21
      B
10 11 12 13
14 15 16 17
18 19 20 21
      A + B
11 12 13 14
16 17 18 19
21 22 23 24

I often need this type of operation, and instead have to use

      (#transpose (#rotate #shape B) #reshape A) + B

which is a waste...

Notice, I used STSC's APL/PLUS keyword form (what I remember of the
keyword form) to substitute for the APL characters.  Someone recommended
to me that we can place APL programs on the net using keywords, and it
seems like a good idea.


Marc S. Meketon
hou2f!vifl