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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 ?