similar to: including figures in html documentation/help

Dear R community, I have a problem when I use functions as default values for argumnents in other functions. When I use curly brackets { here, I can not create a package with inlinedocs. It will give me the error when using package.skeleton() in my package structure: Error in parse(text = utxt) : <text>:4:0: unexpected end of input For example: dummyfunction = function(filters =

Dear list members, I use the package inlinedocs to create documentation for a package that I am building. The function package.skeleton.dx() is used to convert the source *.R file into the *.Rd documentation file. Usually this works like a charm, but on several occasions I got messages like this one: extra.code.docs prefixed.lines extract.xxx.chunks title.from.firstline

Dear list, this might be an easy one, but I could figure out a solution (or how to google the right term). Is there any way to test whether all elements of a vector are identical? For numeric vectors I would use sum(diff(vector)==0)==0 but I have character vectors. Any Ideas? Cheers Jannis

Dear list, is there a function in R that returns the product of a vector? E.g. if the vector is c(1,2,3,4) it should return 1*2*3*4=24 Cheers Jannis

Dear list memebers, I am stuck with using regular expressions. Imagine I have a vector of character strings like: test <- c('filename_1_def.pdf', 'filename_2_abc.pdf') How could I use regexpressions to extract only the 'def'/'abc' parts of these strings? Some try from my side yielded no results: testresults <-

Dear list members, I frequently program small scripts and wrap them into functions to be able to check them with checkUsage. In case these functions (loaded via source or copy pasted to the R console) use functions from other packages, I get this error: no visible global function definition for ?xxxxxxx? For example: test = function() { require(plotrix) color.legend() }

For documentation we use a system that generates Rd files from special comments in the code. (inlinedocs). It is crucial to be able to get the defining source code for objects like methods to extract the comments from it. Here is an R session that shows how this works for several kinds of methods and (at the end of the session) how if fails for methods of "initialize" >

Dear List, does anybody has experience with the RNetCDF package? I manage to open a connection and copy data from a ncdf file but would need a way to automatically retrieve variable names (ideally all of them from one file) and units from the file. Any ideas? Jannis

Hey R folks, i found some strange (to me) behaviour with chron to POSIXct conversion. The two lines of code result in two different results, on ewith the correct time zone, one without: library(chron) as.POSIXct(chron('12/12/2000'), tz = 'UTC') as.POSIXlt(chron('12/12/2000'), tz = 'UTC') Only the code below would give me a POSIXct object with the correct time

Dear R community, I have a general question regarding indexing in multidiemensional arrays. Imagine I have a three dimensional array and I only want to extract on vector along a single dimension from it: data <- array(rnorm(64),dim=c(4,4,4)) result <- data[1,1,] If I want to extract more than one of these vectors, it would now really help me to supply a logical matrix of the

Dear list, I am trying to understand and use the ff package. As I had some problems saving some ff objects, and as I did not fully manage to understand the whole concept of *.ff, *.ffData and *.RData with the help of the documentation, I tried to reproduce the examples from the help of ffsave. When I ran, however : (copied from the help) message("let's create some ff objects")

Dear list members, is it possible to set some options only inside a function so that the original options are restored once the function is finished or aborted due to an error? Until now I do something like: dummy=function() { old.options=options(error=dummy1()) .... options(old.options) } This works for most cases but when the function terminates because of an error and its last

Dear R developers, as far as I understand the manual of list.files(), there is only a way to exclude directories from the returned vector if you use list.files recursively. In non recursive mode, there seems to be no way of excluding directories (the include dirs argument does not seem to have any effect). Would it not be more intuitive and practical to allow the switching off of directory

Dear list members, does anyone have an idea why the following construction does not work but gives the following error message: assign('test', array(1:10, dim=c(10,10))) dimnames(get('test')) <- list(1:10,1:10) Error in dimnames(get("test")) <- list(1:10, 1:10) : target of assignment expands to non-language object What could be a way to get this to work?

Dears, a way to define x and y positions in plots in relative numbers (e.g in fractions between 0 and 1 referring to relative positions inside the plot region) would really help me. One example I would need this to would be to add text via text() to a plot always at a defined spot, e.g the upper left corner. Until now I always determined maximum x and y values and used those, but defining

Dear List, i would like to mimic the behaviour or the following indexing with a do.call construct to be able to supply the arguments to `[` as a list: test = matrix[1:4,2] result = test[2,] My try, however, did not work: result = do.call(`[`,list(test,2,NULL)) result = do.call(`[`,list(test,2,)) result = do.call(`[`,list(test,2,'')) How can I use the do.call in that way with

Dear R users, i am trying to get the line number of the code where an error is produced. With the options: options(keep.source = TRUE, show.error.locations = TRUE, keep.source.pkgs = TRUE) I have managed to get the error locations to show up when i source the respective files. They do not, however, show up for the same errors when I use installed packages. Do I have to build these packages

Dear List, i run R non interactively and use option(error = dump.frames) to reconstruct the cause of errors for debugging. One of the functions in the call stack however uses the "..." (dot dot dot) argument. When I run debugger() and try to browse to this functions' environment I get the following error message: Error in get(.obj, envir = dump[[.selection]]) : argument

If you start a function in one file but don't close it, the package will still build if you manage to close it in a later file. Like so: a.R b.R c.R a.R: function_a <- function(){ print("this is function_a") } b.R: function_b <- function(){ print("unclosed function_b") # no closing } c.R: function_c <- function(){ print("function_c will be part of

Dears, is there any way to "switch off" or work around the error message that pops up when I do something like: A<-B['logical vector'] and when 'logical vector' only consists of FALSE values? My problem is that this message always kicks me out of my loops and always testing via an if clause whether 'logical vector' contains any TRUE values is much too