Computer algebra in R - would that be an idea??
Just a note to point out that Martin's R implementation of APL's "take" function was pretty neat. Could we preserve it for posterity somewhere in the R distribution? Failing that, it would complement subsums() of the magic package very nicely. <mustn't flame APL....[holds head].....no flaming allowed........> best wishes Robin
On 15 Jul 2005, at 14:14, Martin Maechler wrote:
"bry" == bry <bry at xdocs.dk>
on Fri, 15 Jul 2005 14:16:46 +0200 writes:
bry> About a year ago there was a discussion about interfacing
R with J on the J
bry> forum, the best method seemed to be that outlined in this
vector article
bry> http://www.vector.org.uk/archive/v194/finn194.htm
(which is interesting to see for me,
if I had known that my posted functions would make it to an APL
workshop...
BTW: Does one need special plugins / fonts to properly view
the APL symbols ? )
bry> and use J instead of APL
bry> http://www.jsoftware.com
well, I've learned about J as the ASCII-variant of APL, and APL
used to be my first `beloved' computer language (in high school!)
-- but does J really provide computer algebra in the sense of
Maxima , Maple or yacas... ??
(and no, please refrain from flame wars about APL vs .. vs ..,
it's hard to refrain for me, too...)
Martin Maechler, ETH Zurich
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