From Kurt.Hornik@ci.tuwien.ac.at  Mon Aug 25 11:12:14 1997
From: Kurt.Hornik@ci.tuwien.ac.at (Kurt Hornik)
Date: Mon, 25 Aug 1997 12:12:14 +0200
Subject: R-alpha: `missing' BB functions
Message-ID: <199708251012.MAA14358@aragorn.ci.tuwien.ac.at>

Here are the functions documented in the Blue Book that I found missing
in R (ignoring the ones which are obviously outdated).

	aggregate allocated amatch axes chull clorder cutree cycle date
	debugger dget discr faces interp l1fit labclust lag loglin
	monthplot mstree mulbar napsack odometer persp plclust plotfit
	rep.int restore rreg sabl sablplot set.seed smooth sort.list
	Stable stars starsymb storage subtree symbols tempfile tslines
	tsmatrix tsplot tspoints twoway unlink usa xor

In some detail:

aggregate cycle lag smooth tslines tsmatrix tsplot tspoints:
	Obviously useful for time series.  Andreas has a quick version
	of lag() ...

allocated storage:
	Something to display the current memory consumption (other than
	as a byproduct of calling gc() would be nice ...
amatch

axes:
	Seems to be the same as title() except for axes = T and F, resp.
	R currently does not have this extra arg.

chull

clorder(?) cutree discr faces(?) labclust(?) mstree(?) plclust stars
subtree:
	These are already (sort of) in the full version of `mva' as
	(still?) planned by Ross (question marks indicate the ones not
	mentioned explicitly)

date:
	If we'd want this, we could add
		date <- function() system("date")
	to work under UNIX, at least

debugger

dget

loglin:
	Would this be useful?  It should not be too hard to write
	something around AS 51 ... Should that be compatible with the S
	version?
interp

l1fit rreg:
	These would certainly be nice as workhorses, but shouldn't L1
	and robust fitting of linear models be specifyable at the model
	level?

monthplot sabl sablplot

mulbar:
	Would be nice to have, in particular in connection with Mosaic
	plots ...

napsack

odometer

persp:
	This is already in "3D GRAPHICS" of PROJECTS.

plotfit twoway:
	Outdated?

rep.int

restore:
	Should be the opposite of dump() ... In R, can we simply use
	source()?

set.seed:
	Martin, do you have a version of that for R? 

sort.list

Stable:
	Jim Lindsey <jlindsey@luc.ac.be> wrote that he has d and p
	function for the four-parameter stable family, perhaps we should
	include this.
	
starsymb

symbols

tempfile:
	Would be very useful, although I'd prefer it to be called
	`tmpfile' instead.  I am not sure if tmpfile() is ANSI C.  If
	so, we could simply wrap around it, as Fritz posted some time
	ago.

unlink:
	We most likely don't need this one, right?

usa:
	Would be nice, of course ...

xor:
	Is trivial and useful.  Could we add
		xor <- function(x, y) { (x | y) & !(x & y) }
	to the distribution?

-k
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R-alpha: `missing' BB functions
Kurt Hornik