The one that gives results that you trust and uses algorithms that you understand!
Cheers Andrew On Wed, May 04, 2011 at 12:52:03PM +0000, Halldór Björnsson wrote: > Hi, > > I have three matrices (X,Y,P) with the same dimension. The X,Y grid is > regular and I want to > perform linear interpolation to pick out certain points. In matlab > appropriate call is > something like > > Pout=interp2(X,Y,P,Xout,Yout, method="linear") > > where Xout and Yout are the locations where I want the Pout data > (typically a different grid). > (Scipy has this routine in interpolate.interp2d, with similar arguments) > > > In R there is (as often) the choice between many different > interpolation routines. Akima has one for irregularly spaced > data (and does not like co-linearity in the data). Fields has another > one, with a more complicated arguments. > > What is the best R function that accomplishes this? > > Sincerely > Halldór > > ______________________________________________ > R-help@r-project.org mailing list > 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. -- Andrew Robinson Program Manager, ACERA Department of Mathematics and Statistics Tel: +61-3-8344-6410 University of Melbourne, VIC 3010 Australia (prefer email) http://www.ms.unimelb.edu.au/~andrewpr Fax: +61-3-8344-4599 http://www.acera.unimelb.edu.au/ Forest Analytics with R (Springer, 2011) http://www.ms.unimelb.edu.au/FAwR/ Introduction to Scientific Programming and Simulation using R (CRC, 2009): http://www.ms.unimelb.edu.au/spuRs/ ______________________________________________ R-help@r-project.org mailing list 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.
