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Hi, noticed that when I import a shapefil with readOGR() the coordinates are truncated to integers. Is there some way to prevent this type of behaviour? cheers, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of...

Hi, I am not quite sure how to interpret the differences in output when changing conf.type from the default "mean" to "individual". Are these analogous to the differences between "confidence" and "prediction" intervals, as defined in predict.lm {stats...

On Wednesday 06 May 2009, spencerg wrote: > help.search('bayes') only searches installed packages. > > To go beyond that, you might try the following: Thanks for the clarification. Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of...

Greetings: are there any simple ways to convert an sp class object to a splancs ppp class object, outside of reading the coordinates and computing a bounding box? cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at...

Hi, Is anyone aware of a rank-based, non-paired test such as the Krustal-Wallis, that can accommodate weights? Alternatively, would it make sense to simulate a dataset by duplicating observations in proportion to their weight, and then using...

On Tuesday 26 June 2007 10:14, Nair, Murlidharan T wrote: > Is there a function that calculates the inter-rater agreement index > (kappa) in R? > > Thanks ../Murli I have found a couple useful approaches: # PCC, kappa, rand index require(e1701...

Hi, Is it possible to create "custom" variogram models that can be used within the gstat framework? For example, would it be possible to generate a custom exponential model in the form of: gamma = C [ 1 - exp (-3h/a) ] instead...

Hi, I have a dataset that is stratified by 3 levels, with an unequal number of observations per strata: A B C 182 182 91 The data are approximately normally distrubuted. Is there any reason why I can NOT use...

On Friday 29 August 2008, Mark Difford wrote: > Hi Danilo, > > >> I need to do a model II linear regression, but I could not find out > >> how!! > > The smatr package does so-called model II (major axis) regression. > > Regards, Mark. While...

On Thursday 09 October 2008, Anne Goarant wrote: > Hello! > > Does anyone know how to open a .grd file (surfer type file) with R (or > convert this kind of file in ascii)? I tried using the RSAGA library but > failed. > rsaga...

Hi, Is anyone on the list familiar with an R implementation of Piper Diagrams? Example: http://faculty.uml.edu/nelson_eby/89.315/IMAGES/Figure%209-78.jpg I am thinking that two calls to triax.plot (plotrix) along with...

Greetings, I am using both the lrm() {Design} and glm( , family=binomial()) to perform a a logisitic regression in R. Apart from the typical summary() methods, what other methods of diagnosing logistic regression models does R provide? i.e. plotting...

On Wednesday 26 September 2007, Lorenzo Isella wrote: > Dear All, > I hope this is not a FAQ, but my online research was not fruitful. > Consider a standard 2D plot generated with the "plot" command. > I would like to introduce inside...

Hi, I am able to reverse the order of plotting on regular plots (i.e. with the plot() function) by manually setting the xlim variable. Is there some trick like this which will work for a boxplot? * for example: l...

On Wednesday 24 September 2008, Satterthwaite, Paul wrote: > Hello, > > > > I am a very new user of R, but have used S-Plus for about a year or so. > I am curious about methods of creating simulated patch landscapes in R...

On Wednesday 24 September 2008, Satterthwaite, Paul wrote: > Hello, > > > > I am a very new user of R, but have used S-Plus for about a year or so. > I am curious about methods of creating simulated patch landscapes in R...

Hi, Is it possible to plot two raster images using spplot() in a manner similar to: pts <- list("sp.points", points_file, pch = 4, col = "black", cex=0.5) spplot(raster_file, zcol="elev.pred", sp.layout=list(pts)) Note...

Hi, Is there a simple way to suppress the plotting of polygon boundaries with spplot() ? # simple list of 12 colors cols <- brewer.pal(12, "Paired") # plot pile of polygons, with 12 classes: spplot(x, zcol='class2', col.regions=cols, scales...