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no. 213848 filed 17.36.47  tue 19 apr 1994
from crl
to   uclapl
subj Toronto ACM SIGAPL meeting April 25, 1994 (AGM proposed)


The next meeting of the Toronto ACM APL Special Interest Group
is on Monday, April 25, 1994, from 6:30 to 8:30 pm.

Speakers:  Michael Friendly and John Fox of York University

Topic:     "On the Design and Implementation of APL2STAT, An
           Object-Oriented Environment for Statistical Computing and
           Graphics."

Location:  BCE Place (Canada Trust Tower)
           10th floor Cafeteria,
           Bay St. and Front St., Toronto, Ontario

Free Admission  -  All Welcome!


Object-oriented design is a programming methodology well-suited
to the implementation of large, complex systems such as database
systems, windowing systems (Xwindows, NeXTstep), and to
developing applications with consistent interfaces and which can
share data and methods with ease.  There have been several
attempts to develop object-oriented systems in APL, but these
have mainly been small demonstrations of OO concepts and
techniques.  In this talk, Michael Friendly and John Fox describe
the design and implementation of APL2STAT, an object-oriented
environment for statistical computing and graphics.

The talk will include a general introduction to object-oriented
concepts and methods; a demonstration of APL2STAT; illustrations
of APL2 programming techniques which implement object-oriented
methods in APL2STAT and in other applications; and the use of
APL2 operators to generalize many statistical methods and to
provide a uniform way to deal with missing data.

Michael Friendly is Associate Professor of Psychology at York
University.  His most recent book is ``SAS System for Statistical
Graphics'' (SAS Institute, 1991).  He has been using APL in
teaching and research for over 20 years.

John Fox is Professor of Sociology and Mathematics & Statistics
at York University.  He is author of ``Linear Statistical Models
and Related Methods'' (Wiley, 1984) and ``Regression
Diagnostics'' (Sage, 1991), and is a long-time APL user.


Annual meeting notice: The executive proposes to move the
       administration of electing the 1994/95 executive from
       the May meeting to the April meeting. If approved, then
       pizza will be available for members following the
       presentation! Visitors are welcome to join in for a small
       fee.


Future meetings: Monday, 16 MAY 94.
                 IBM Conference room
                 Aetna Tower, third floor, rooms 302-303
                 79 Wellington St. W., Toronto

                 Jim Brown of IBM on APL2 for OS/2 and other
                 platforms and client/server environments.



The April 1994 issue of "Gimme Arrays!" will be distributed to members of
the Toronto SIG, and other APL SIGs worldwide next week.


Toronto SIGAPL contacts 1993/94:

  Chair - Cameron Linton, crl@ipsalab.tor.soliton.com
  Secretary and Newsletter Editor - Marc Griffiths, marcg@utcc.utoronto.ca
  Treasurer and Membership - Eric Granz, phone 416-980-7149
  Information Co-ordinator - Richard Procter, rjprocter@ipsalab.tor.soliton.com

  P.O. Box 384, Adelaide Street Post Office, Toronto, Ontario, Canada, M5C 2J5





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