Title:
Writing new graphics functions with grid

Abstract:
This talk will describe how to write a new graphics
function using the grid graphics package.  There will
be an emphasis on writing functions that cooperate with
each other.  A properly-written grid function should
make it possible/easy to:  add further output to the
output produced by the function;  embed the output from
the function within output from other functions; and
interactively edit the output from the function.  Time
permitting, there will also be a discussion of how to
write a new graphical class with grid.