similar to: random point in a circle centred in a geographical position

Rusers: I am trying to apply a quadratic discriminant function to find the best classification outcomes. 1 is assigned to the values greater than a threshold value; and 0 otherwise. I would like to see how the apparent error rates and the optimal error rate change with increasing threshold values. I have a 1000*10 data matrix: n=1000 and p=10. Here is what I wrote so far, but seems to be

Dear R-users, I am trying to plot in the same map both NUTS 2 (i.e. regional) and NUTS 3 (i.e. provincial) boundaries for Italy but I couldn't find how to plot more than one level boundary in the same map.// // I have shapefile both for regions and provinces in Italy and I tried to use the "maptool" and "maps" packages without success. Thank you in advance for any help.

Hello, I want to crate a blanck geographical map showing continent boundary of region: latitude = -5:35 longitude = 35:100 If we create data like: lat= -5,0,5,10,...... long=35,40,45,50,......... Then how to map (long,lat) and create a map plot. Many thanks, Yogesh [[alternative HTML version deleted]]

Dear all, is it possible to perform logstic type of geographical weighted regression in R software? thanks in advance. robert. [[alternative HTML version deleted]]

I would like to create a geographical grid to have a sort of a reference grid for my georeferenced survey data. The grid should be in a xy format, wgs1984 with a 0.025 degree, alternatively 10km, resolution covering -14 to -24 S and 24 to -34 E (Zimbabwe). Additionally I need to be able to export it as a .dbf Hope someone can help an R- novice ! [[alternative HTML version deleted]]

Dear All, I like very much figure 2.a) and 2.b) of this paper http://www.nature.com/srep/2013/130410/srep01640/pdf/srep01640.pdf and I probably need a similar visualization. Is anything like that doable in R? I have some experience with R and gadm (gadm.org), but that is only to produce maps colored according to a scalar. I do not know how to visualize maps with a "perspective", let

Dear Dario Sacco, >>>>> "DS" == Dario Sacco <dario.sacco at unito.it> >>>>> on Thu, 06 May 2010 17:45:30 +0200 writes: DS> Dear Dr. Maechler, DS> I am an agronomist and a researcher at the University of Turin. I am DS> also teaching "Applied statistics", then I have some knowledge in DS> Statistics, but not

Is there packaged code to convert geographical coordinates (e.g., longitude, latitude, elevation) to Cartesian coordinates in 3-space? I can see how to do this using 1. a spherical-to-Cartesian conversion like pracma::sph2cart(tpr) http://cran.r-project.org/web/packages/pracma/ 2. a geographical-to-spherical conversion. This seems to involve (in roughly increasing order of difficulty or

Hi, I am looking for a way to plot bar on a map instead of the standard points. I have been using ggplot2 and maps libraries. The points are added with the function geom_point. I know that there is a function geom_bar but I can't figure out how to use it. Thank you for your help, Simon ### R-code library(ggplot2) library(maps) measurements <-

Dear all, I have two coordinates vectors, say X and Y of length n. I want to generate for each couple of coordinates X1,Y1 X2,Y2 X3,Y3....Xn,Yn a random coordinate which is located in a square define as X +/- dx and Y +/- dy. I saw the runif function which can generate for just one value at a time what I want : runif(1, X - dx, X + dx) for X and runif(1, Y - dy, Y + dy) for Y. I would like

r-help lattice adepts: I have a question which is somewhat geospatial, so I posted to r-sig-geo rather than here: https://stat.ethz.ch/pipermail/r-sig-geo/2012-November/016757.html > summary: How to overlay a geographical map on each panel in a lattice > (or Trellis), e.g., of levelplot's? Note I am not inquiring about > creating choropleth maps[,] which Sarkar 2008 covers quite

Hi R users I need the map of France?s ? communes ? (towns) to build a map Is there a way to get it? More generally: How to do to get the map of a country and its different geographical levels? Best regards -- View this message in context: http://old.nabble.com/map-of-a-country-and-its-different-geographical-levels-tp26225645p26225645.html Sent from the R help mailing list archive at

I have not been able to get DB migrations to work at all in Rails 1.0 for me. On multiple platforms I continually get the same errors. It took me awhile to figure out some initial things, such as Migrations don''t seem to support Enum column types, and doesn''t really support Foreign key relationships (the constraints at least). After changing my DB schema to jive more with the

Dear R, Can't I cluster a dataset into k clusters where k is exactly the number of observations? I have version 12.2 installed. See this example > a <- matrix(1:100, 20) > kmeans(a, 20) Error: number of cluster centres must lie between 1 and nrow(x) This is a bit ad-hoc but I known R from version 2.12 allows number of clusters to be one. So I guess allowing number of clusters to be

Dear list, I'm using lattice::levelplot to plot a coloured image of 3D data. The range of the z values goes from negative to positive, but is not exactly centred around 0. I would however like to map a diverging colour scale with white falling exactly at 0, and both extremes being symmetrical in the legend to better contrast the opposite change in colour saturation. The following dummy

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Dear All, I am contemplating centering the covariates in my Cox model to reduce multicollinearity between the predictors and the interaction term and to render a more meaningful interpretation of the regression coefficient. Suppose I have two indicator variables, x1 and x2 which represent age categories (x1 is patients less than 16 while x2 is for patients older than 65). If I use the following

Dear all, I am using "coxme" function in Kinship library to fit random treatment effect nested within centre. I got 3 treatments (0,1,2) and 3 centres. I used following commands, but got an error. > ugroup=paste(rep(1:3,each=3),rep(0:2,3),sep='/') > mat1=bdsmatrix(rep(c(1,1,1,1,1,1,1,1,1),3),blocksize=rep(3,3),dimnames=list(ugroup,ugroup)) >

[Cc-ing xapian-discuss as other people may be able to help] On Sat, Feb 19, 2011 at 11:45:20PM +0000, francis wrote: > I installed xapian1.2.4 on Lucid; libxapian1.2.4 seems to be > incompatible with synaptic quick search - typing two or more chars > produces a segmentation fault. The synaptic search(find) button works > ok. Software Centre search is also broken. I guess you're

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