search for: piccolboni

Hi, I was wondering if there is anything more efficient than split to do the kind of conversion in the subject. If I create a data frame as in system.time({fd = data.frame(x=1:2000, y = rnorm(2000), id = paste("x", 1:2000, sep =""))}) user system elapsed 0.004 0.000 0.004 and then I try to split it > system.time(split(fd, 1:nrow(fd))) user system elapsed

Hi, I get a 404 page not found on the root. There is not webmaster link on r-project.org that I can see. Whom should I contact? Thanks Antonio PS: Yes I was trying to report my first bug. It's a conspiracy with p < 0.01. [[alternative HTML version deleted]]

Hi, sorry if this question is trivial or unclear, this is my first venture into mixed C/R programming (I am reasonably experienced in each separately). I am trying to write a serialization function for a format called typedbytes, which is used as an interchange format in Hadoop circles. Since I would need to serialize according to the internal R format many small R objects I looked at the c

...how-to book for R programmers: http://bit.ly/j4e9Lg A detailed example of using the RevoScaleR package to analyze a large airline data set: http://bit.ly/laTNrt A new guide for R beginners, "How to Learn R", provides links to R resources, blogs and courses: http://bit.ly/knQr5q Antonio Piccolboni compares 7 language interfaces to Hadoop, with a focus on the R interface, Rhipe: http://bit.ly/lNWZka Airline route charts make for a fun game of "guess the airline": http://bit.ly/k1bwe8 . FlowingData shows how it's done in R: http://bit.ly/kgkrTT Jeffrey Breen provides some usefu...

...and author of "R Cookbook", Paul Teetor: http://bit.ly/sMYRsC A report from the ACM Data Mining Camp includes several applications of R: http://bit.ly/vIq96a A list of the "Top 50 Statistics Blogs" includes several that post content related to R: http://bit.ly/uk8kio Antonio Piccolboni gave a presentation to the Bay Area R User Group demonstrating that it's much easer to do K-means clustering in Hadoop with help from R: http://bit.ly/uPCsAZ R user Yanh Zhan offers seven good reasons to like R: http://bit.ly/tkkNGF Joseph Rickert reflects on a presentation by Brad Efron on B...

Hi, I am looking for the equivalent of capture.output for stdin. Imagine I am writing a test for a function that reads from stdin, say scan. >1: foobar 2: Read 1 item [1] "foobar" (please don't reply that scan can also read from a file, that's not what I am trying to test; let's say I found a bug that occurs only when reading from stdin, fixed it and I want to add a test