similar to: RUnit detects parse error, but why?

First, the reproducable example, showing how converting from character to POSIXct to character changes the milliseconds in the first time stamp though not in the second: > as.POSIXct('2010-06-03 9:03:58.324') [1] "2010-06-03 09:03:58.323 PDT" > as.POSIXct('2010-06-03 9:03:58.325') [1] "2010-06-03 09:03:58.325 PDT" This seems to be due to truncation of

Folks, I've been running into an odd situation that occurs when I use length() function with aggregate(), but not with either one separately. Together, the results looks correct but is given an unexpected name. 'if (stringsAsFactors) factor(x) else x' instead of just 'x'. # Numbers work ok tt <- data.frame(idx=c(1,1,1,1,1,1,2,2,2,2,2,2)

Folks, Updating values in a table is simple in SAS or SQL, but I've wracked my brain looking for an elegant solution in R to no avail thus far. Certainly this is a common need that's been solved in dozens of different ways. Given an initial dataframe nn and a smaller dataframe of updates uu, I'd like to replace the values in nn <- expand.grid('a'=1:4, 'b'=1:3)

Folks, In brief -- how many of you have found the 'operators' package to be valuable in their work? Not that I lack respect for the amount of work involved in creating and maintaining a package, but I am unsure about the utility of these new operators. Several of the operators appear to offer different ways of accomplishing tasks that are already relatively easy in base R -- regular

Folks, I'm checking the structure of a dataframe for duplicate parameters at a site station (i.e depth should be measured once, not twice), using aggregate to count each parameter within a site station. The fake data below has only 26000 rows, and takes roughly 14 seconds. My real data has 750000 rows and I had to stop execution after about an hour. The by() function is faster, but I

Folks, I've run into trouble while writing functions that I hope will create and modify a dataframe or two. To that end I've written a toy function that simply sets a couple of variables (well, tries but fails). Searching the archives, Thomas Lumley recently explained the <<- operator, showing that it was necessary for x and y to exist prior to the function call, but I haven't

I know R has a steep learning curve, but from where I stand the slope looks like a sheer cliff. I'm pawing through the available docs and have come across examples which come close to what I want but are proving difficult for me to modify for my use. Calculating simple group means is fairly straight forward: data(PlantGrowth) attach(PlantGrowth) stack(mean(unstack(PlantGrowth)))

Folks, A small group of us are working together to develop a set of R functions to support data management and analysis using Eclipse/StatET in a Windows environment. We are using Git/EGit for version control. We work within our own repository and occasionally push to a common remote location. I'd like to have the code source files from the 'local' git repository without

Some might have noticed that REvolution Computing released the doSMP package to the general public about a month and a half ago, which allows multiple cores to be accessed for parallel computation in R. Some of our physical habitat calculations were taking an extraordinary amount of time to complete and required over-weekend runs, which prompted our interest in this package. What follows

Dear all, my colleagues and I have to write some R code for some of our projects. I would like to ask you help to organize us a little. a. Do you know if there is any system that can convert our R scripts to html pages with some nice dependency graphs (which functions calls which). b. Could you please suggest me an easy way to exchange the R code with my colleagues. I know about these version

I''d like to announce the first release of capistrano-runit-tasks. This came about as I wanted to use runit rather than spinner/spawner/ reaper on my memory limited VPS but should be useable for any setup. From the README: This library extends Capistrano to allow processes to be supervised using the runit package. It replaces some of the standard tasks with runit versions and

Folks, I am looking for a means for calculating the 1-R^2 ratio for variable selection to mimic the values of PROC VARCLUS in SAS. While there may be better methods for variable selection, we are trying to duplicate published results at this time. To date, I have been unable to find a way to obtain this value from Hmisc::varclus , stats::hclust and clustvarsel::clustvarsel. Can any of you give

Having used JUnit and PyUnit, I was pleased to see the release of the RUnit package on CRAN. I'm wondering if there are any RUnit users out there that would be willing to share some tips on how they organize their code to work with RUnit. Specifically, I'm wondering about the best way to load/import/source the functions to be tested. I would like to end up with a script, testall or some

Hello! I have looked at Martin's recent work on "merging" unit tests with R CMD check, fused it with my and Tony's contributions and developed it a bit further. Take a look into the attached demo package on how it works. In essence: PKG/inst/RUnitTests |- runRUnitTests.R (script to run RUnit tests) \- ... (any RUnit test file)

I''d like to announce the second release of capistrano-runit-tasks, available from http://rubyforge.org/projects/cappy-runit/ It now supports: * File based templates * sv as the service control command in addition to runsvctrl * A much simpler interface for creating additional services. More work still needs to be done though! == TODO * Allow add_service to create more than one

Hi! I appologize for crossposting, but this might be of broader interest. In case you are interested in fusing RUnit with R CMD check under unix alike OS, here is one way of doing/hacking this. My aim was to perform unit tests: (1) during R CMD check (2) at any other time Say you have a package PKG in a map PKG. I use the following structure PKG |- R |- ... |- inst | |- doc | `-

Hi all, Could anybody point me to some latest productivity tools in R? I am interested in speeding up my R programming and improving my efficiency in terms of debugging and developing R programs. I saw my friend has a R Console window which has automatic syntax reminder when he types in the first a few letters of R command. And he's using R under MAC. Is that a MAC thing, or I could do the

Hi, I''m deploying Unicorn on a Rails application with RUnit. Technically I''m using Chef''s deployment tools, if any of you are familiar with it (https://github.com/opscode-cookbooks/application_ruby) but to be clear they aren''t doing anything magical, so this is purely an issue with RUnit and Unicorn. The TL;DR of the following post, which has lots of

I made my own RUnit testing convention, and I want to introduce this to one of my friends. Before that, I'd like to review my codes. The problem that I met when I tried to polish my codes is: How can I get the file path in the file??? I.e., I want to get the path to the file that I'm writing using some magic R functions. But I couldn't find any good magic. Is there any magic? So, I

Dear R-help list users, I have a huge vector of numbers, how I can invert orden? For example x <- 1:10000000 I would like to obtain x_r <- 10000000:1 Thanks, Sebastian.