THU.APR,990408
18:30-21| Eric Iverson , J Language . NYPC C++ and Java SIG, IBM , 590 Mad @
  57  RSVP : Anne Faust 
|18:56| Eigenpicture : interal eigen functions . Knots in open GL graphics
 fn makefknot OpenGL primitive ?  Eric using white space to keep
 intro expressions clear . 
 Interactive auto script learning Lab . Me : written in J itself ? Y |
 extended precision arithmatic . | ( 2x ^ 70 ) - (2 ^ 70 ) |>| 262144 |
 lot of profs give names to everything  | power =: ^  |  bond &
  `| `residue  ;  |. rotate  |: transpose
 Higher order fns :|   avg =:  +/   % #    ננ   (+/ d) % # d
  parens color coded .  ' J =: complex rich '
 Scripts .

centigrade =: verb define
 t =. y. - 32              NB. local assignment
 ( t  * 5 ) % 9
)

  | NYSE monthly CDrom . - all exchanges .  same demo as  APL98 Rome .
  (JCHAR ; 22) map_jmf_  'ctbin' 'filename'
  $ cdbin  |>|  11332740 22
  ctidx  is 200000 list of stock symbols
    n fn\"1 d   || n wide moving application of fn  ( convolution ) .
  noticed IBM large blocks traded lower | BrookeAlan - don`t forget a seller
   on every trade too . 200M rows . Memory Mapped file like any other paged
   memory .
 Hybrid w Excel front end . patched thru VisualBasic .. Similar to K method .
 Moskowitz : map range of cells ?  conditional  Yes .
 J compute engine loaded as a dll in C++ address space .
|19:58|  www.cppsig.org 
|20:20| ?s : history - speakeasy normal keyboard matrix language . Why make
 new version of APL ? Ken Notation in mid `50 . Frustrated w User base .
 Can`t evove it . Split in `90 . took look @ universe of langs at that time .
 Mkt width & depth ? Academic & free lots - Serious - small # s .
 User :  J & ODCB | Other user actuary - moved to  J in  `97 |
 BA : J and APLs cooperate w each other well |
 EI : open libraries of interfaces . 'We thing in terms of things which are
  timeless .' really mathamatians dealing w real world .
 Guy who knows  APL J & K :  J for applied math - stat & physics .
 Exception handling ? Y | Spreedsheet pkgs written in J ? No - don`t reinvent
  . Do have grid object - can scroll over infinite amount of data ( fn ) .
 www.jsoftware.com | vs SPSS , SAS in handling large data ? Don`t know
 specifically , but very efficient on large data | aud : others have awesome
 libraries of fns  | EI : can go to Mathhand book and transliterate .
 BA : APL in `74 - same stuff now solve hugh real problems - SPSS have grown
 linearly in speed - APLs more like *2 | EI : Lang always stated problem
 way you wanted - now can run that way | BA : people converting his
 prototypes to eg C++ end up slower | EI : 'Compiler' becoming obsolete word
 ( a 'duh' to all of us APLers . )
 Distribute encrypted scripts | Aud : IPC ? do like everyone else . mainly
 sockets . std library . |20:50|

  ============================: THU.NOV,001116 :============================
18|  Iverson`s J Language  85 West St .
 Marriott Fin .  RSVP 
 Eric Iverson presiding :
|18:36| Brooke Allen has group | me only K-er .
 J 4.06 beta next week | pub early & often . incremental . more regular
 change proceedure . communication thru J Forum ; not usegrp .
 | Symbol data type . linear search algos . driven by performanve reqs of
  client ,
 2bytes unicode chars as of tue , japanese . interface w VB .
 J as COM obj .  added to existing methods in COM .
 Brooke : symbol as index ? allow association . with sig except o K , opt for
 minimal , simple other language interface .
 Numerous perforance improvements .
 shift to .dll engine . high vol data procession
 UNIX 4.02  yr & half old . dependent on proprietayy compilers .
Aud : improvement  v werse performance in releases ? test suite . let us know
 test suites .
 Pocket PC - style vs risc , Roger did . by e o yr .
 need standard library scripts .
 Win-CE Sockets ? dll call .
 COM COM+ CORBA RBC , Threading models - too old to hack . layers of software
 5 mi thick . J socket w be simple & clean .
 Internet bings us full circle to TCP/IP .
 new session mngr in Java Unix .
 Window driver simple scripts continue to run .
 If wnted closed Java source , could ship now .
  3 !: family  thru pipe , clean , internal to
  Dyalog mistake of century .
  multi threaded client .
|19:44| EI : meeting schedule ?   Medisoft HQW each Q ?
 focused , so get something learned . Roger , Chris speak .
 Next meeting March . Eric @ metadata
|20:2| Next conf Sept in NYC ? any volunteers ?

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