[R] How to check if R.app is running?

Nick Matzke matzke at berkeley.edu
Sun Jan 20 22:51:14 CET 2013

Hi, here's an obscure question someone can hopefully help with.

I have some R code that uses stuff from parallel (now a part 
of the R core in 2.15 I believe), especially clusterApply. 
However, this seems to cause problems in R.app, and I've 
seen advice to not use these multicore functions, e.g. doMC, 
in R.app.

So, I want to make this optional.  How can have a program 
check whether or not it is running in R.app or regular R?

Thanks so much for your help!!

PS: I saw this:

Which says to use:


...but that doesn't work.  Interactive R is fine (e.g. 
starting R from Mac Terminal), only R.app is not.

Nicholas J. Matzke
Ph.D. Candidate, Graduate Student Researcher

Huelsenbeck Lab
Center for Theoretical Evolutionary Genomics
4151 VLSB (Valley Life Sciences Building)
Department of Integrative Biology
University of California, Berkeley

Graduate Student Instructor, IB200B
Principles of Phylogenetics: Ecology and Evolution

Lab websites:
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Lab phone: 510-643-6299
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Cell phone: 510-301-0179
Email: matzke at berkeley.edu

Mailing address:
Department of Integrative Biology
1005 Valley Life Sciences Building #3140
Berkeley, CA 94720-3140

"[W]hen people thought the earth was flat, they were wrong. 
When people thought the earth was spherical, they were 
wrong. But if you think that thinking the earth is spherical 
is just as wrong as thinking the earth is flat, then your 
view is wronger than both of them put together."

Isaac Asimov (1989). "The Relativity of Wrong." The 
Skeptical Inquirer, 14(1), 35-44. Fall 1989.

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