[R] help with my sloppy syntax

[Charles Annis, P.E.]

Thank you Professor Ripley:

>From your response it is clear that I left out something important, for
which I apologize.

Part of the et cetera is another list.  Your method, which would work
otherwise, also converts the other list to its members.  The program being
called has an argument list like (a, b, c, d, e, w, x, y, z) where z is a
list but the other elements are single variables (not lists or vectors).

I have the values of (a, b, c, d, e) returned from the R function "optim" as
results$par.  I wish to call my function with those values, some others, and
finally with that other list, z.

Is there a way to do this without defining another variable "var" and
listing its elements without the undesirable unlisting that terminal
variable z?

Thank you.

Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  614-455-3265
http://www.StatisticalEngineering.com
 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of Prof Brian Ripley
Sent: Thursday, August 14, 2008 11:20 AM
To: Charles Annis, P.E.
Cc: r-help at r-project.org; annisc at asme.org
Subject: Re: [R] help with my sloppy syntax

Try c(as.list(par), a.hat.decision, .... et cetera ...)

We are guessing what any of these are, of course.

On Thu, 14 Aug 2008, Charles Annis, P.E. wrote:

> R-ians:
>
> After some effort I coerced my code to do what I want but my syntax is a
> kludge.  Suggestions on more elegant syntax?
>
> 	par <- NIM.results$par
> 	do.call("Draw.NIM.POD.curve", list(par[1], par[2], par[3], par[4],
> 	par[5], a.hat.decision, .... et cetera ...
>
> It seems that I should be able to avoid defining the variable "par" and
then
> specifying each of its elements, but all my attempts resulted in a list
> whose first element is a list, rather than the elements of the list.  And
my
> attempts at unlist were unsuccessful.
>
> Thank you.
>
> Charles Annis, P.E.
>
> Charles.Annis at StatisticalEngineering.com
> phone: 561-352-9699
> eFax:  614-455-3265
> http://www.StatisticalEngineering.com

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595