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
getting round the absence of system() on R for Mac
2 messages · Dr Gregory Jefferis, stefano iacus
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 _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@stat.math.ethz.ch http://www.stat.math.ethz.ch/mailman/listinfo/r-sig-mac