search for: interp2

...want to know the bathymetry associated to the second dataset. I thought it was a good idea to do an interpolation between the two datasets. I find a script doing that on matlab but i want to do it on R. Do you how to do it? for ii = 1:length(seal_dive_depth07) seal_bathy_depth07(ii) = interp2(long,latg,A,seal_lon07(ii),seal_lat07(ii)); end Karine HEERAH Master 2 mention "océanographie et environnements marins", parcours océanique 42 rue Salvador Allende 92000 Nanterre 06.61.50.97.47 _________________________________________________________________ [...

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. A...

...is the code library(akima) library(fields) library(tripack) soil <- read.table("http://www.unc.edu/~zhuz/teaching/Stat890/Data/soil.txt",header=TRUE) attach(soil) soil.interp <- interp(u, v, moist) # linear interpolation works plot.surface(soil.interp) # spline interpolation soil.interp2 <- interp(u, v, moist, linear = F) # spline interpolation returns only NA's # triangulation tri.mesh(soil$u, soil$v) # got error Thanks