search for: geary

Hi, I have a question on testing spatial autocorrelation on raster data including NA-values. In particular, I like to calculate Moran?s I and Geary?s C indices by using inverse distance weighting matrices. Calculating Moran?s I with moran.test works fine, because the function contains the option "na.action=na.pass". Unfortunately, the function geary.test does not contain this option. The problem is that geary.test needs an nb a...

Dear Users: I have been trying to use the geary.test() function in *R*, but am having slight difficulty understanding how I am to apply it in my context. I have 2 matrices: 1) *n x p* matrix of *n* observations with *p* measurements each. It may be noted that this matrix has a spatial dimension to it, as the *n*observations are at different geo...

Hello, i' m looking for a function to compute geary statistic for spatial correlation. Thanks. -- St?phane DRAY --------------------------------------------------------------- Biom?trie et Biologie ?volutive - Equipe "?cologie Statistique" Universite Lyon 1 - Bat 711 - 69622 Villeurbanne CEDEX - France Tel : 04 72 43 27 56 Fax : 04...

David Geary will be speaking at the Pikes Peak Java Developers group meeting, Tuesday, November 8. The meeting starts at 6:00pm. So if you live in the Colorado Springs area, come out and help support rails! For the detailed agenda, visit, http://www.ppjdg.org Also, if you are interested in starting a Ruby Gr...

hello, I want to do a test for spatial correlation. I tried it with geary.test() but I don't understand the required input. x= a numeric vector the same length as the neighbours list in listw (my sampled data, I assume) listw= a listw object created for example by nb2listw (well when I check nb2listw() I get to "neighbours - an object of class nb" - but...

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Has anyone found a good method of mass mailing a bunch of people (100k) using RoR yet? I have always used a scheduled task to run a ColdFusion page every x minutes to send out blocks of about 7500 (sending the full 100k crashed the page) and this worked pretty well and now we are migrating all out sites to ruby, I seed to do something similar. Thanks in advance, James

...adísticos descriptivos espaciales 1. media Central 2. media central ponderada 3. centro de mínima distancia 4. desviación estándar de las coordenadas 5. desviación estándar de la distancia ü autocorrelacion espacial 1. estadístico I de moran 2. estadístico c de geary 3. correlograma de moral 4. índice del vecino mas cercano 5. k de ripley Herramientas estadísticas para zonas calientes La moda La moda difusa Cluster jerarquico del vecino mas cercano Cluster de k medias ü Análisis de espacio tiempo 1. índice de Knox 2. Índice de mantel...

...y beginning to learn the basics, but so far I've been able to do little more than try a few examples, and of course begin reading the documentation. My primary motivation for exploring R is the availability of tools like the 'spdep' package for calculating spatial statistics such as Geary's C and Moran's I, which I would like to use in an analysis for my thesis. However, I am not really sure how to get started. As a simple example, if I have a table with columns containing an ID field, X & Y coordinates, and an observation value, what steps should I follow to pre-...

We don't have enough arguments here.... <g> I see that thunderbird's deprecated for RHEL 7, and they recommend evolution. I've certainly had some annoyances in the last couple-three years with t-bird. So, what are people's preferred mail tools, other than t-bird (or maybe mutt or pine.... <g>)? mark

Thanks to this thread, we got it working too... but have a question... Once this is setup... does it stream forever, or does the stream only start when someone goes on hold/into a queue/etc? If it streams forever, at 24k... it looks like over 7GB/month in bandwidth... so we're not going to want to do that if a) it streams constantly and b) my math is correct. Thanks, Doug >

Wondering if anyone here has built Balsa for Centos-7. I've used it on Centos 5 and 6 for years, though I had to compile it myself. It compiles cleanly on c7, but when run I keep getting error messages that say "Failure to sync mailbox xxxx" that seem to happen when I try to view a mailbox that has new/unread mail, or perhaps it happens when a mailbox receives new mail whilei Balsa

...rs, I am glad to announce the release of a new package for R: DCluster. It implements a number of methods for the detection of clusters of disease. It includes methods to test Poisson extra-variation (Chi-square test and Potthoff-Whittinghill's test), Spatial Autocorrelation (Moran's I and Geary's c), general clustering (Whittermore's statistic and Tango's statistic), scan methods (Openshaw's GAM, Besag & Newell's methods and Kulldorff & Nagarwalla's statistic) and a focused test (Stone's Test). Bootstrap is used to estimate significance and a number of...

...tat.math.ethz.ch [mailto:r-help-request at stat.math.ethz.ch] Sent: Tuesday, July 01, 2003 3:09 AM To: r-help at stat.math.ethz.ch Subject: R-help Digest, Vol 5, Issue 1 At 18:48 30/06/2003, Martin Wegmann wrote: >hello, > >I want to do a test for spatial correlation. >I tried it with geary.test() but I don't understand the required input. >x= a numeric vector the same length as the neighbours list in listw (my >sampled data, I assume) >listw= a listw object created for example by nb2listw (well when I check >nb2listw() I get to "neighbours - an object of class nb...

...rs, I am glad to announce the release of a new package for R: DCluster. It implements a number of methods for the detection of clusters of disease. It includes methods to test Poisson extra-variation (Chi-square test and Potthoff-Whittinghill's test), Spatial Autocorrelation (Moran's I and Geary's c), general clustering (Whittermore's statistic and Tango's statistic), scan methods (Openshaw's GAM, Besag & Newell's methods and Kulldorff & Nagarwalla's statistic) and a focused test (Stone's Test). Bootstrap is used to estimate significance and a number of...

Hi, I'm have some data on a grid (specifically high throughput assay plates) and am interested in evaluating measures of spatial autocorrelation to flag plates for corrections. I have been using moran.test and geary.test from the spdep package. My approach is as follows: ## plate is a matrix of data coords <- expand.grid(1:32, 1:48) x <- as.numeric(plate) moran.test(x, nb2listw(tri2nb(coords))) While this works and seems to give me reasonable results, I am not specifying a weight matrix and am imposin...

Dear useRs, I was searching CRAN for implementation of kurtosis and skewness tests, and found that there is some kind of lack on it. So, I have written three functions: 1. Anscombe-Glynn test for kurtosis 2. Bonett-Seier test based on Geary's kurtosis (which is not widely known, but I was inspired by original paper describing it, found coincidentally in Elsevier database) 3. D'Agostino test for skewness These three functions are not enough to make another small package, so I am waiting for ideas about implementing it in so...

If I do: script/generate controller Photo I get a controller named photo_controller. OTOH, if I do: script/generate scaffold Photo I get a controller named photos_controller. (Note that the controller name is pluralized). I realize that I''m specifying the controller name explicitly in the first case, but it seems odd to me that the scaffold command generates a pluralized

I will be on vacation from <22/06/06> to <30/06/06>. I will not be reachable on my mobile. I will have limited access to mails, and please expect a delayed response. In my absence, please contact the following: Ray Richard or Safeer Mohammed Thanks H.Gireesh

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