search for: correlog

Hi, I'm doing cross-correlation correlograms with the ncf package. I have four study sites ; four correlograms. I'd like to get the same y scale for the four of them... only, using "ylim=c(-1,1)" does not change the y scale never and I don't know why. I tried with plot() too. Is there another option to change the ylim...

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Hello, I am working with two datasets with ~5,200 observations. Apparently, neither the correlog function (ncf package) nor the mantel function (ecodist package) can handle these datasets. Does anyone have any experience about the maximum number of observations these functions can handle? I am considering partitioning them into smaller subsets. This would not be an ideal soluti...

Dear listers, I was used to package pgirmess under Windows with everything OK, but, for the first time, I had a trial this afternoon on Ubuntu 7.10 gutsy (I have a double boot computer and work more and more under unix) and R 2.7.0. Everything went OK except this: sudo R CMD check pgirmess ..... * checking examples ... ERROR Running examples in 'pgirmess-Ex.R' failed. The error most

...nce of a non-linear relationship between biomass density and bottom depth. Hence my interest in GAMs. Predictors of primary interest are lake (factor) and bottom depth (continuous). The fish data are autocorrelated at varying ranges, depending on species and year. I've tested this using correlog (package ncf) The bottom depth data are also highly autocorrelated. Because of the autocorrelations in data, autocorrelations in GAM residuals (up to 20 lags in some cases), patterns in residual plots from GAM models, and very narrow confidence intervals for the predictions, I feel that GAM re...

Group, I'm currently trying to find out how the function correlog in the ncf package may be useful to me for calculating cross-correlograms. The function's output includes P-values for all distance classes, but it seems that only positive values can become significant. Is this true and correct? If so, why? Thanks in advance. Ren? Eschen. __________________...

I want to do "moran's I test" in R language. I try to use "gearymoran" in Package "ade4","moran" in Package "spdep", and Moran.I in Package "ape". But I do not know how to do it because data format is different. My data: x y dbh 111.03 10.7 7 118.11 0.28 1.2 165.36 0.36 8.4