similar to: How to detect if a vector is FP constant?

Hi all, Is there any chance that readRDS and saveRDS might one day become read.rds and write.rds? That would make them more consistent with the other reading and writing functions. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/

Hi all, Does anyone have a comprehensive list of recursive-type objects in R? is.recursive defines them as by exclusion: "most types of objects are regarded as recursive, except for vector types, ?NULL? and symbols (as given by ?as.name?)." I think this that means recursive objects are: * lists * pairlists * calls * expressions Did I miss anything? Hadley -- Assistant

Hi all, Are there base functions that do the equivalent of this? fliptb <- function(x) x[nrow(x):1, ] fliplr <- function(x) x[, nrow(x):1] Obviously not hard to implement (although it needs some more checks), just wondering if it had already been implemented. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/

Hi all, I'm struggling with accessing a package dataset (munsell.map, stored in sysdata.rda) when that package is imported, not required. A simple reproducible example is: install.packages("munsell") munsell::mnsl("10B 4/6") # Error in match(col, munsell.map$name) : object 'munsell.map' not found library(munsell) munsell::mnsl("10B 4/6") # Function

Hi all, Does anyone have an R implementation of the queplot (K.?M. Goldberg and B.?Iglewicz. Bivariate extensions of the boxplot. Technometrics, 34(3):pp. 307?320, 1992)? I'm struggling with the estimation of the asymmetry parameters. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/

Hi, Is there such a thing? If no: is it easily simulated? thanks, Joh

Hi all, Is there a straight-forward, cross-platform way of determining if a user has all the tools needed to develop R packages (i.e. gcc etc)? It doesn't need to be 100%, but should give a rough idea. One idea I had was simply to see if system("R CMD install --help") worked. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University

Hi all, If a package suggests another package in its description, you can check it at runtime with requires. How do you do check if a package is available without loading it, if you only want to access one function in the package namespace. Thanks, Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/

Hi all, I frequently find that I've failed to export something in my NAMESPACE and hence my package doesn't work when it's imported into another package. Does anyone have suggestion for debugging this type of problem? R CMD check passes without any ns related errors on both the importee and the importer. I've attached a reproducible example - if you install the development

Hi all, Does any one know of any encryption/decryption algorithms in R? I'm not looking for anything robust - I want some way of printing output to the screen that the user can't read immediately, but can decrypt a little later. The main thing I don't want to the user to see is a number, so (e.g.) ROT13 isn't appropriate. Hadley -- Assistant Professor / Dobelman Family Junior

readNEWS() states: Read R's ?NEWS? file or a similarly formatted one. This is an experimental feature, new in R 2.4.0 and may change in several ways and news() also indicates that this tool is supposed to work with non-R news files. However, I've not been able to get readNEWS to read a package news file, even when following the format indicated in news(). Looking at the

Hi all, Since roxygen is a great help to document R packages, I am wondering if there exists an approach to go back from the raw Rd files to roxygen-documentation? E.g. turn "\author{Somebody}" into "@author Somebody". This sounds ridiculous, but I believe it helps in the long term for me to maintain R packages. Thanks! Regards, Yihui -- Yihui Xie <xieyihui at

Dear All, a quick xtable question. I do have quite a bunch of tables in my latex document which I produce with xtable. That works fine so far. But I wonder is it possible set some values such as "environement", "caption.placement", or "size" globally so that it applies for table unless otherwise specified? If anybody has quick fix, that would be helpful. Thanks and

Am I missing something obvious on how to draw multi-line plots in base graphics? In ggplot2, I can do: data(Oxboys, package = "nlme") library(ggplot2) qplot(age, height, data = Oxboys, geom = "line", group = Subject) But in base graphics, the best I can come up with is this: with(Oxboys, plot(age, height, type = "n")) lapply(split(Oxboys[c("age",

Hi All - I have been using the windrose function found in the circular library to create great looking windroses.  But the dashed, circular percent interval lines that indicate the frequency at which each "pedal" occurs are not evenly spaced (the corresponding parameter is "cir.ind").  That is, the 5% interval closest to the heart of the windrose is wider than the 5-10 chuck,

Hi all, all.equal is generally very useful when you want to find the differences between two objects. It breaks down however, when you have two long strings to compare: > all.equal(a, b) [1] "1 string mismatch" Does any one know of any good text diffing tools implemented in R? Thanks, Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice

Hi all, What's the official name for the value that represents a missing argument? e.g. formals(plot)$x str(formals(plot)$x) deparse(formals(plot)$x) is.symbol(formals(plot)$x) What's the correct way to create an object like this? (for example if you are manipulating the formals of a function to add an argument with no default value, as in http://stackoverflow.com/questions/3892580/).

Hi all, Does anyone have any suggestions for debugging the execution of examples by R CMD check? The examples work fine when I run them from a live R prompt, but I get errors when they are run by R CMD check. Thanks, Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/

Hi everyone, I have been merging many big dataframes (about 80000 rows each) and I never had this problem, but now it happened to me and I want to know if someone knows what could be happening. The final dataframe has many rows, an impossible number! I have done edit(dataframe) and I saw that there are many repeated rows (all equal). Thanks for any help, Cec?lia Carmo Universidade de

library(plyr) n<-100000 grp1<-sample(1:750, n, replace=T) grp2<-sample(1:750, n, replace=T) d<-data.frame(x=rnorm(n), y=rnorm(n), grp1=grp1, grp2=grp2) system.time({ d$avx1 <- ave(d$x, list(d$grp1, d$grp2)) d$avy1 <- ave(d$y, list(d$grp1, d$grp2)) }) # user system elapsed # 39.300 0.279 40.809 system.time({ d$avx2 <- ave(d$x, interaction(d$grp1, d$grp2, drop =