R-beta: various comments: image(), complex(), time series, 3D graphics

Ben Bolker (ben@eno.Princeton.EDU)
Wed, 4 Jun 1997 11:55:11 -0400 (EDT)


Date: Wed, 4 Jun 1997 11:55:11 -0400 (EDT)
From: Ben Bolker <ben@eno.Princeton.EDU>
To: r-help@stat.math.ethz.ch
Subject: R-beta: various comments: image(), complex(), time series, 3D graphics
In-Reply-To: <199706031842.NAA00975@utdallas.edu>


   First of all, hearty thanks to all for undertaking this project; it
looks like it will solve many problems for me in the future (cost of
S-PLUS, lack of a Linux port, unresponsiveness of StatSci/MathSoft, ...) I
would like to contribute in some way, I will look around for a project
that's about my size.

  A few questions/comments about minor S-PLUS/R inconsistencies:

  1) complex() in S-PLUS also takes optional arguments modulus and
argument (instead of re and im): I just wrote a little wrapper program

  Complex _ function(modulus=1, argument=0) {
     complex(real=modulus*cos(argument),imag=modulus*sin(argument))
  }

  but perhaps this change should be made in the C code itself (I would
  consider doing it myself as soon as I've gotten a little more familiar
  with the way the C code works).

  2. In S-PLUS, if Z is a matrix,  image(Z) works -- in R, you get a
  missing argument error and have to say image(z=Z); again, not a big deal
  and (presumably) fairly easy to fix.

  3.. Any plans to implement acf(), etc.?  (I may get around to writing my
    own.)

  4. Any plans for 3-D graphics (persp() and friends)?  This is a place
   where it would presumably be very easy to do better than S-PLUS (at
   least than release 3.1, which is what I'm using), where 3-D graphics
   are very clearly old and clunky.  I guess a fair amount of thought
   should go into the design phase, though ...

 -- in future, should I bother sending comments like this (for which I
don't really need help) to the help-list, or just to the R address?


Benjamin Bolker          Dep't of Ecology and Evolutionary Biology,
ben@eno.princeton.edu    Princeton University
tel: (609) 258-6886,     fax: (609) 258-1334

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