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Hi everyone, My colleague and I recently fit a linear mixed effects model with lmer(), and after looking at the results, my supervisor is interested in having me examine the influence of individual observations (he suspects that there may be...

An update: Ok - now that I knew it wasn't the raster that had been 'downsampled', I looked more closely at the points in R, using zoom() as Barry suggested, and it is the point that is in the incorrect...

Hello! I am requesting help for a data set in which I have 6 evaluators (I've called them 'Trainers'), each of which took a questionnaire with 180 questions. The possible answers to the questions are ordinal numbers. I am...

Hi Tara, I have not been able to find any additional information on an acceptable method for examining spatial autocorrelation in the residuals of a glm model (or any model besides an lm), nor have I been able to ascertain...

Thanks Dennis. That package came close to what I'm trying to do, and was very useful at identifying influential levels of the grouping factor. I'm wondering if there is a way to do the same calculations for individual...

Hi everyone, I've been searching all over the Internet, and through the literature, and can't seem to find the answer to this question - hopefully someone here can help. I have a dataset that consists of counts of birds...

Hi everyone, I'm an advanced ArcGIS user, but new to doing all things spatial in R (I typically only use R for graphing and regressions). That said: I've written some code to calculate shortest paths between nest sites...

Hi everyone, - I'm conducting a habitat selection analysis for which my response variable is either species richness (i.e.,counts; negative binomial distribution) or presence/absence of a species. - I have confirmed spatial autocorrelation in the response variables using...

Hi everyone, I recently wrote to Roger Bivand regarding the 'autocov_dist' function in spdep for use in an autopoisson, and as per his suggestion, I'm posting our conversation (below) to the list, as others may find it useful...

Thanks for your quick replies! Okay - Barry, you are right in that I was "mislead" by the raster plot in R. I had used the plot() function to examine the raster, transition layer and geocorrected transition layers in R, followed...

Hi folks, I have a dataset that consists of counts over a ~30 year period at multiple (>200) sites. Only one count is conducted at each site in each year; however, not all sites are surveyed in all years. I...

Thanks Andy. I did read that posting, but didn't find that it answered my questions. Ok - so I've confirmed that I can use popMeans in the doBy package to obtain the LSmeans as described in my e-mail...