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The APL\360 Terminal System
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Roger Hui
Oct 14, 2009, 1:25:05 AM10/14/09
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An item of historical interest, first published 42 years ago this
Friday.
Friday.
Ibeam2000
Oct 14, 2009, 4:48:33 PM10/14/09
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Mistranslation: Please have a look at the "rec" (matrix inversion)
function which appears toward the end of the document. There are a
couple of alphas in the function (I imagine these should be "take").
function which appears toward the end of the document. There are a
couple of alphas in the function (I imagine these should be "take").
Ibeam2000
Oct 14, 2009, 4:48:50 PM10/14/09
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Roger Hui
Oct 14, 2009, 6:32:59 PM10/14/09
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The phrases are correct as stated (and the rec function
has been tested to work). In that version of APL
a⍺b ←→ a↑b⍴1
See Table 2 in the document.
Ibeam2000
Oct 15, 2009, 12:33:49 AM10/15/09
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Ah yes, that alpha. And its companion, omega. I remember this from
early APL\360, no scans, no domino, no catenation.
early APL\360, no scans, no domino, no catenation.
Ibeam2000
Oct 18, 2009, 5:25:35 AM10/18/09
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What APL system and data were used to test the "rec" function?
Roger Hui
Oct 18, 2009, 3:02:16 PM10/18/09
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On Oct 18, 2:25 am, Ibeam2000 <ibeam2...@gmail.com> wrote:
> What APL system and data were used to test the "rec" function?
> What APL system and data were used to test the "rec" function?
In Dyalog v12.1, for a random matrix m, rec m was
compared against ⌹m, with function alpha←{⍺↑⍵⍴1}
substituting for ⍺ .
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