[rkward-devel] troubles

[Thomas Friedrichsmeier]

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On Thursday 10 February 2011, Branimir K. Hackenberger wrote:
> Dear All!
> 
> I have trouble with using functions like interp (akima) and akimaInterp
> (fUtilities). Namely, each time used these functions I have obtained two
> different results (as I send you in attachment). How is it possible?
> Beside them sometimes on picture is appearing white line across the
> image (independent of resolution - sometimes by high and sometimes by
> low resolution - completely irregularly).
> 
> Thx!

Hi!

The example code from ?interp and ?akimaInterp works for me, without apparent 
problems. I observe that the difference between the two plots you attached 
appears to be that one of them is not complete. The regions that have been 
drawn appear identical on first glance.

As you may be aware, RKWard is only a frontend to the "R" software 
environment. Further a lot of functionality available in R is not maintained 
by the R project itself, but is provided by contributed packages, in this case 
"akima".

The issue you are experiencing is very likely not directly related to RKWard, 
and neither to R, but to the akima package. As one simple test, try running 
your code in a plain R session outside of RKWard, to test whether you observe 
the same symptoms, there.

If, after that, you believe that the problem is really specific to RKWard, then 
please provide us with more specifics. Preferrably this would be an example R 
script which we can run to reproduce the problem. Also, please include 
information on the versions of R, RKWard, and akima in use (output of 
sessionInfo()).

If you think the problem is more likely specific to the akima package, the 
maintainer of this package is listed as "Albrecht Gebhardt <albrecht.gebhardt 
at uni-klu.ac.at>" at http://cran.r-project.org/web/packages/akima/index.html 
. Most likely this is the person you should contact. Most likely this person 
will also ask you for an example R script, and the output of sessionInfo().

I hope this will help you to find a solution.

Regards
Thomas
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