It would be helpful if you actually supplied your code and a minimal data set 
to for people to examine.

Please have a look at 
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
 and/or http://adv-r.had.co.nz/Reproducibility.html.

I'm not clear if you are reporting a general R problem or a specific package 
with the ripa package.  If it looks like it is the latter you probably bring it 
to the attention of the package maintainer who may or may not monitor this 
mailing group.


John Kane
Kingston ON Canada


> -----Original Message-----
> From: ehand...@macalester.edu
> Sent: Fri, 25 Mar 2016 15:09:42 -0500
> To: r-help@r-project.org
> Subject: [R] fftImg() error: fftw_access_func
> 
> Hello-
> 
> My name is Eric Handler and I am an academic technologist supporting
> the Science Division(7 academic departments) at Macalester College in
> Saint Paul, MN. The faculty use R for a variety of teaching and
> research tasks around campus. I administer our RStudio instance and
> have encountered an error I can't resolve. A student working on an
> independent research project has reported that he received the
> following error when attempting to use the ripa function fftImg():
> 
> Error in .C("fftw_access_func", as.complex(img), as.integer(w),
> as.integer(h),  :
>   "fftw_access_func" not available for .C() for package "ripa"
> 
> I've been able to recreate this error in RStudio as well as directly
> in R. I've also recreated the error across different platforms(Ubuntu,
> Mac OS X 10.10 and 10.11). My test platform's sessionInfo() output is
> below:
> 
> R version 3.2.3 (2015-12-10)
> Platform: x86_64-apple-darwin13.4.0 (64-bit)
> Running under: OS X 10.11.3 (El Capitan)
> 
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
> 
> attached base packages:
> [1] parallel  tcltk     stats     graphics  grDevices utils     datasets
> [8] methods   base
> 
> other attached packages:
> [1] fftw_1.0-3 ripa_2.0-2
> 
> loaded via a namespace (and not attached):
> [1] tools_3.2.3 Rcpp_0.12.3
> 
> A google search for "fftw_access_func" doesn't reveal anything modern
> on this topic, only mentions of OS 10.4 and 10.5 and rimage, which
> doesn't seem to exist anymore(perhaps it was a predecessor to RIPA?)
> 
> Can someone help me get the student functional with fftImg() or
> alternately, tell me it is a known issue and an alternative option(if
> available) for the student?
> 
> Thanks,
> Eric
> 
> --
> Eric Handler
> Academic Information Associate - Science Division
> Macalester College - Saint Paul, MN
> Olin-Rice 124
> Office: 651-696-6016
> View my calendar: http://goo.gl/SbxLOu
> 
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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