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Hi, I have a question about computing shortest Euclidean distances between two data frames of spatial points... I have 2 dataframes (not yet converted to spatial class) >Sewers<-data.frame(x=c(10,20,35,50),y=c(100,150,200,300)) >transect <- data.frame(x=seq(from=0, to=50, by=1),y=seq(from=100, to=150, by=1)) I would like to be able to compute the shortest distance from the

Hi all, I'm stuck trying to get syntax correct for the follwing type of loop. I would like to find the column with the largest value in a given row, and create a new column with a categorical variable indicating which column the highest value of "i" comes from. too=data.frame(A=rnorm(10,1),B=rnorm(10,2),C=rnorm(10,1.5)) too$large=0 too$large=for (i in 1:length(too[,c(1,2,3)]))

Hi all, I'm searching for a little clarification on partial mantel tests (ecodist package) I've a distance matrix (x,y), and several others containing environmental/chemical variables. Based on the help file, and the package instructions I've managed to implement the tests as; var1 ~ env1 + space to partial out the effect of space and test the relationship between the

I have a spatialpixelsdataframe containing bathymetry data. Is it possible to save this as something similar to the meuse.grid so it can be loaded without having to run the spatial interpolation each time the script is called? I don't see a straightforward method in the sp documentation.

Hi all, A two part quick question regarding gls 1) I'd like to pass a formula to gnls from a gam(mgcv package). Is there a quick way to do this? I tried using >gnls(gam$call$formula, data=df, correlation=AC1) but it keeps outputting a message to the effect that I need x ~ y etc as the formula. I realize now that the $formula part of the gam is only sending x ~ s(y) and that this is

Hi all, I've read the R for windows FAQ and am a little confused re: memory.limit and memory.size to start using R 2.6.2 on WinXP, 2GB RAM, I have the command line "sdi --max-mem-size=2047M" Once the Rgui is open, memory.limit() returns 2047, memory.size() returns 11.315, and memory.size(max=T) returns 19.615 Shouldn't memory.size(max=T) return 2047? Upon running several