similar to: extracting values

Dear all, I'm getting more and more frustrated with the whole S4 thing and I'm looking for a more advanced summary on how to deal with them. Often I get error messages that don't make sense at all, or the code is not doing what I think it would do. Far too often inspecting the code requires me to go to the source, which doesn't really help in easily finding the bit of code

Dear all, This problem came up initially while debugging a function, but it seems to be a more general problem of R. I hope I'm wrong, but I can't find another explanation. Let me illustrate with the raster package. For an object "RasterLayer" (which inherits from Raster), there is a method xyValues defined with the signature

Buenas días me gustaria saber cual es la libreria mas actual que contiene al algoritmo de maxima entropia que permite modelar nichos ecologicos; a su vez que libreria presenta mejor temática en la representacion de mapas. Saludos¡ [[alternative HTML version deleted]]

Hello list. Until last week, I've been using my function without a problem. I can only imagine what has changed (no package updates), but all of a sudden, a custom function that uses raster::xyValues stopped working. For some reason, one of the values is not found, even though it's there. Here is a snippet of code from browser() call from within my custom function where everything goes

 Hello   I have questions about gbm package.  It seems we have to devide data to two part (training set and test set) for first.   1- trainig set for running of gbm function 2- test set for gbm.perf      is it rigth? I have 123 sample that I devided 100 for trainig and 23 for test.   So, parameter of cv.folds in gbm function is for what?   Thanks alot Azam       [[alternative HTML

There seems to be a bug in "image" in R 13.1 (on windows 32 & 64 bits) and on R-devel that is not present in R 13.0 and before. The below creates a plot with many white lines, horizontal and vertical, more or less regularly spaced. The effect is particularly dramatic when the plotting window is made very small. image(t(volcano)[ncol(volcano):1,]) Robert Hijmans University of

Good afternoon Has anyone tried using Dr. Elith's BRT script? I cannot seem to run gbm.step from the installed gbm package. Is it something external to gbm? When I run the script itself <- gbm.step(data=model.data, gbm.x = colx:coly, gbm.y = colz, family = "bernoulli", tree.complexity = 5, learning.rate = 0.01, bag.fraction = 0.5) ... I

With the current version of the "raster" package (that I maintain), R CMD check on packages "soilDB" and "PopGenReport" have this NOTE: Package: soilDB Check: data for non-ASCII characters New result: NOTE Error in .requirePackage(package) : unable to find required package 'raster' Calls: <Anonymous> ... .findInheritedMethods ->

Dear R-helpers and Dr. Hijmans, I can not invoke maxent() in GNU Linux. Could you give me any directions on that? There is maxent.jar in version 3.3.3e in the right folder. ######################################## R: > jar <- paste(system.file(package="dismo"), "/java/maxent.jar", sep='') > jar [1] "/ebio/abt6/jmao/rpacks/dismo/java/maxent.jar"

I get an error when using self-defined (not standard) functions with mapply with S4 objects from the raster package that I develop: "Error in as.character(sys.call(sys.parent())[[1]]) : cannot coerce type 'closure' to vector of type 'character'". Does anyone understand why? The problem is illustrated below. Thanks, Robert > # First a general example that works

?dir.create (part of the base package) says that: "dir.create and Sys.chmod return a logical vector indicating which operation succeeded for each of the files attempted" However, on my system it returns nothing (whether successful or not): > dir.create(":::@!#!::") > dir.create('b') > sessionInfo() R version 2.9.0 (2009-04-17) i386-pc-mingw32 locale:

I had difficulties running R CMD check and build on windows 7. The problem seems to be that the script creates folders to which nobody has any access permissions (not even read). So the script can not delete these folders or open files. This worked for me: Go to the properties of the root folder of your R project (e.g. "D:\R"). Change the settings so that this folder and its

This code will read binary file and display it as a map. may problem is that this code is using a continuous colour scheme, even though I have discrete data (which is a classification scheme). How can I map numbers to colours with raster? Please require(raster) conne <- file("C:\\lai.bin", "rb") sd<- readBin(conne, integer(), size=1, n=360*720, signed=F)

Hi All, I have corefile where we see NULL pointer de-reference PANIC as we have sent (deliberately) NULL pointer for return value. vdev_disk_io_start() ... ... error = ldi_ioctl(dvd->vd_lh, zio->io_cmd, (uintptr_t)&zio->io_dk_callback, FKIOCTL, kcred, NULL); ldi_ioctl() expects last parameter as an

CRAN (and crantastic) updates this week New packages ------------ * allan (1.0) Alan Lee http://crantastic.org/packages/allan Automates Large Linear Analysis Model Fitting * andrews (1.0) Jaroslav Myslivec http://crantastic.org/packages/andrews Andrews curves for visualization of multidimensional data * anesrake (0.3) Josh Pasek http://crantastic.org/packages/anesrake This