similar to: "For" loop and "if" question

Background: OS: Linux Mandrake 10.1 release: R 2.0.0 editor: GNU Emacs 21.3.2 front-end: ESS 5.2.3 --------------------------------- Colleagues Is there a function to calculate distances between adjacent latitude/ longitude pairs in a matrix? It is basically a spatial diff() function that I have in mind. Data: long1, lat1 long2, lat2 long3, lat3 looking for: diff(data$long, data$lat)

I am wondering if there is a function which will do a join between 2 data.frames by minimum distance, as it is done in ArcGIS for example. For people who are not familiar with ArcGIS here it is an explanation: Suppose you have a data.frame with x, y, coordinates called track, and a second data frame with different x, y coordinates and some other attributes called classif. The track data.frame has

I''m stuck in a catch-22 type problem. I have an insert form for a table that uses the validation in the model. i.e. When you click submit on the form and haven''t filled in the required fields then you get the nice rails error messages saying "field can not be blank". This works fine until I introduce some more logic. What I''m trying to do is to validate

Deemed colleagues I would appreciate your help with a sentence to calculate the linear distance between 2 geographical points (coordinates in UTM). In advance thnks for your attention, -- Ricardo Bandin Llanos rbandin@udec.cl Estudiante - Magíster Cs. m. Pesquerías Universidad de Concepción, Región del Bio-Bio, Chile Celular: (0056-41) 97949957 [[alternative HTML version deleted]]

Dear, I am trying to visualise a time-progressing line (it's supposed to represent spread patterns) using brew package and Google Earth. The idea is to have a function which takes start and end point geographic coordinates, as well as number of intervals to chop the path up, and returns the collection of points segmenting this line. Unfortunately my calculations fail for large distances,

Dear R users, I need to find the coordinates for the point (midpoint) located half way between two pairs of coordinates (lon1,lat1 and lon2,lat2) assuming a straight line between them. What would be the best way? I tried to find an answer in the help archives but without success. I would greatly appreciate any help. df<- data.frame(lon1=c(-4.568,-4.3980), lat1=c(59.235,56.369),

Just out of curiosity, I took the default "iris" example in the RF helpfile... but seeing the admonition against using the formula interface for large data sets, I wanted to play around a bit to see how the various options affected the output. Found something interesting I couldn't find documentation for... Just like the example... > set.seed(12) # to be sure I have

Hi, I have a set of locations defined by longitude and latitude (in degrees), and want to calculate the spatial (or geographic) distance among all locations. I did not find such a function in the spatial-related packages. (I *cannot* use 'dist', as I have geographic, not cartesian coordinates). thanks! Robert Robert Ptacnik Norwegian Institute for Water Research (NIVA) Gaustadall?en 21

Do you have a preferred programming pattern for adding functionality to an ActiveRecord? As an example, say I have some gnarly trig functions for distance and bearing between pairs of latitude and longitude: === file: latlng.rb module LatLng def haversine_distance(lat1, lng1, lat2, lng2) ... end def bearing(lat1, lng1, lat2, lng2) ... end === EOF ... and I want to mix in

Hi list! Short version: How do I convert a whole data.frame from latin1 encoding to utf8? I get SPSS files with latin1 encoding. My OS is GNU/Linux and the locale sv_SE.utf8, and I normally interface R with Emacs/ESS. I have used the following hack to convert a data.frame in latin1 to utf8: > Sys.setlocale(category = "LC_ALL", locale = "sv_SE.iso88591") > foo <-

Andrew Bartlett said once that 'unix charset = LOCALE' means to force samba to read 'LANG=' from environment. >echo $LANG >en_US >cat /etc/sysconfig/i18n >LANG="en_US.UTF-8" >SUPPORTED="en_US.UTF-8:en_US:en" >SYSFONT="lat1-16" When i restart smbd/nmbd all my files inside all shares change their names. Its looks an charset mis-match

Hi! Here is my isolinux.cfg. It's slackware based. ====================== default Kernels/bare.i/bzImage initrd=initrd.img load_ramdisk=1 prompt_ramdisk=0 ramdisk_size=8192 rw root=/dev/ram ZILIX_KERNEL=bare.i prompt 1 timeout 1200 font lat1-16.psfu display mensagem.msg F1 mensagem.msg F2 opcoes.msg F3 help.msg label linux kernel Kernels/bare.i/bzImage append - label adaptec.s kernel

Hi, When i restart smbd/nmbd, all the files inside all shares change their names. All the files are affected specially accent portuguese brazilian files. File names become a mess in whole samba server. 1) Has anyone seen this kind of samba server behavior? 2) Im using samba 3.0.4, is there a recognized bug? , if i change to latest version will this issue be solved? Any suggestions are highly

Hello, This is what I am trying to do: I wrote a little function that takes addresses (coordinates) as input, and returns the road distance between every two points using Google Maps. Catch is, there are 2000 addresses, so I have to get around 2x10^6 addresses. On my first go, this is what I did: ######################################### getRoadDist = function(X,complete=F){ # X must be a

 Hi, What's the equivalent of "Save to File" from the R console File menu on an R routine? Just trying to capture the whole R console into a text file when my code fails. Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish & Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx [[alternative HTML version deleted]]

Hi, all. I haven''t felt at liberty to go axing test cases, but some of the 33 that are failing now are ones I don''t think we want to pass? cruft coming from Markdown or made up to fill a gap some years ago. I''d like to float the proposition that we make Super (and thus RedCloth 4) behave as identically as possible to Textile2 as working on