Message-ID: <Pine.LNX.4.31.0208021917270.32657-100000@gannet.stats>
Date: 2002-08-02T18:20:03Z
From: Brian Ripley
Subject: question
In-Reply-To: <Pine.GSO.4.44.0208021022120.16810-100000@flop.ENGR.ORST.EDU>
On Fri, 2 Aug 2002, Saket Joshi wrote:
> Hi all,
>
> I am running R1.5.0 on Unix.
> I fitted a tree model my.tree on some data my.data and the tree has only 2
> leaves. Now I have some test data new.data
>
> When I run
> predict(my.tree, new.data)
> it does give a reasonable answer but it takes 60 to 90 seconds to come up
> with the answer.
>
> I had expected it to take far less than that considering that the predict
> function has just to traverse a tree with 2 nodes and give the answer.
> Could anyone tell me why this function is taking so much time to run?
Not on the amount of information you have given. Take a look at
`Writing R Extensions' or an earlier Programmers' Niche in R-news for how
to profile your run to see where the time is being spent.
--
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 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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