Please do read the posting guide and FAQ, as we do ask you to do before sending a bug report.
1) Your version of R is not current. 2) akima is a contributed package and you are not the maintainer. We do ask you not to `behave in this manner'. On Mon, 3 Oct 2005 [EMAIL PROTECTED] wrote: > Full_Name: Jonathan Lees > Version: 2.0.1 > OS: linux-gnu > Submission from: (NULL) (152.2.75.65) > > > there is a problem with calculating the convex hull in 2-D interpolation using > the codes interp fromt eh akima package: > > x =c(0.6505304, -1.1821562, -0.2600792, 0.7913716) > y = c(1.0424226, 0.1754048, -1.4523334, 0.2349112) > z = c(0.000, 3.042, 0.370, 0.122) > > > EX = seq(from=min(x), to=max(x), length=100) > WHY = seq(from=min(y), to=max(y), length=100) > > ZZ = interp(x=x, y=y, z=z, xo=EX, yo=WHY, extrap=FALSE) > > plot(x,y, type='n') > image(ZZ, add=TRUE) > points(x,y) > text(x,y,labels=z) > > BUG: > Notice the convex hull is wrong. > It includes only 3 of the 4 points provided. > If you add another point near by it does some > really wierd stuff. > x = c(x, -0.3950865) > y = c(y, -1.449117) > z = c(z, .37) > > > > I do not think it should behave in this manner. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
