Message-ID: <200109242202.f8OM2wH02387@mail.mclink.it>
Date: 2001-09-24T22:02:56Z
From: stefano iacus
Subject: getting round the absence of system() on R for Mac
In-Reply-To: <B7D4B50A.26B9%jefferis@stanford.edu>
system() is not implemented (yet, it would be possible in the next
version but only running under OSX) in R. You can try to use
applescript to interact with other applications.
within R you can run applescript or, from an applescript you can ask R
to execute commands. See the examples in the script directory.
As I'm trying to develop applescript support in R it would be nice if
any of you reading the list suggest me what they would like to do in
this direction.
Stefano
On Lunedì, settembre 24, 2001, at 07:01 , Greg Jefferis wrote:
> Dear All,
>
> I am analysing a set of 200 files describing the 3D structure of
> neurons.
> One of the ways I would like to analyse these 3D data points is to find
> the
> convex hull for each neuron. I have an external compiled C application
> which does that - at the moment it reads in a set of data stored in the
> file
> chull.in and outputs the convex hull description to another outfile,
> chull.out
>
> I would like to write a routine in R which iterates over my 200 neurons,
> replaces chull.in with the points describing the current neuron, runs
> chull,
> read the contents of chull.out into R and update the current neuron
> object.
> I can do everything except call this external program - under unix one
> would
> use system(). Any suggestions?
>
> Many thanks,
>
> Greg.
>
> P.S. I am using R v 1.3.1 on MacOS 9.1
>
> __________________________________________________________________________
> Greg Jefferis, Lab Address: Liqun Luo, Herrin
> 144
> Neurosciences PhD Programme & e-mail:
> jefferis@stanford.edu
> Dept Biological Sciences, Lab: (650) 725 5809
> Gilbert Biology Building, Fax: (650) 723 0589
> 371 Serra Mall,
> Stanford, CA 94305-5020. Home: (650) 497 1135
>
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