similar to: Line color based on data values?

Hi all (I'm sure this question has been asked before, but I cant find it). If I have two character vectors: > x <- c("aaa","bbb","ccc") > y <- c("1","2","3") How can I get the cartesian product of the string values? > expand.grid(x,y) Gives me a data frame with separate columns...however, I cant seem to get *apply

Hi all If I have a string, say "ABCDA", and I want to convert this to the sum of the letter values, e.g. A -> 1 B -> 2 etc, so "ABCDA" = 1+2+3+4+1 = 11 Is there an elegant way to do this? Trying something like which(LETTERS %in% unlist(strsplit("ABCDA", ""))) is not quite correct, as it does not count repeated characters. I guess what I need is

Hi all Here is a rather naive implementation of the SEPA algorithm for generating lexical permutations: lexperm3 <- function(x, n=length(x)) { perms <- list() k <- 1 perms[[k]] <- x k <- k + 1 for (y in 1:(factorial(n)-1)) { i <- n-1 while (x[i] > x[i+1] && i > 0) { i <- i - 1 } # i is largest index st x[i] > x[i+1] j <- n #

Hi R, Can we download Reuters (3000 Xtra) data from R? Does ODBC package help me in this? Or otherwise, is there a way to extract daily closing prices data of Reuters from R? Thank you very much, Shubha This e-mail may contain confidential and/or privileged i...{{dropped:13}}

Sender: r-help-bounces at r-project.org On-Behalf-Of: comtech.usa at gmail.com Subject: Re: [R] [R-SIG-Finance] forecasting earnings, sales and gross margin of a company... Message-Id: <b1f16d9d0810231239k506d582i7ecb908b84bc1642 at mail.gmail.com> Recipient: ngottlieb at marinercapital.com -------------------------------------------------------- This information is being sent at the

I am looking at histogram breaks, and notice something odd: > foo <- hist(runif(10000),breaks=20) > length(foo$breaks) [1] 21 This makes sense to me. > foo <- hist(runif(10000),breaks=200) > length(foo$breaks) [1] 201 This also makes sense. BUT > foo <- hist(runif(10000),breaks=250) > length(foo$breaks) [1] 201 > foo <- hist(runif(100000),breaks=250) >

Dear All, I have a correlation matrix of size 100 x 100 and would like to extract the diagonal matrix from it. I have used the for loop to store tha correlation values of the diagonal matrix. Is there a 'R way' of doing this? Thanks in advance. Kind regards, Ezhil

Hi all, I am playing with some companies' balance sheets and income statements and want to apply what I've just learned from Stats class to see if I can forecast the companies earnings, sales and gross margin in the short term (3rd and 4th Quarter), mid-term (2009) and long term (2011, etc. ) I pulled up some data from companies' financial statements over the past a few years. The

Hi I have a data frame which looks like the following (it is a table of commit logs to a source repo). The Author column is treated as a factor, by virtue of stringsAsFactors being set to TRUE, so I can extract the number of commits per author by using table(logs$Author). Is there an elegant way to extract all subsets of this frame by the Author column - i.e. that returns say a list of data

Dear all, In my attempt to run the below modelling command in R 2.7.0 under windows XP (4GB RAM with /3GB switch set) I receive the following error: Error: cannot allocate vector of size 1.5 Gb I have searched a bit and have tried adding: --max-mem-size=3071M to the command line (when set to 3G I get the error that 3072M is too much) I also run: > memory.size() [1] 11.26125 >

Hi, I have problem loading Rgraphviz. Following the instructions specified by the README in Rgraphviz_1.20.3.tar.gz didn't help either. o. set the following Windows environment variables accordingly (control panel -> systems -> Advanced -> Environment Variables ): (a) create new user variables: GRAPHVIZ_INSTALL_DIR (e.g., C:\Graphviz-2.21)

Hi all This may be an issue that has been discussed at length before, so apologies if I have missed that discussion, but is there any desire to switch from Jitterbug to something more capable and modern? Say JIRA, for instance? Rory Rory Winston RBS Global Banking & Markets Office: +44 20 7085 4476 *********************************************************************************** The

Hi all, My application usually works on huge amounts of data in the size of MB's .So the performance of "R" in this case will increase if Huge pages are used instead of malloc'ing (as in memory.c) . So Are there any methods to support Huge Pages in "R" ? Can any one give some inputs to help me implementing this feature? [[alternative HTML version deleted]]

Hi all, My application usually works on huge amounts of data in the size of MB's .So the performance of "R" in this case will increase if Huge pages are used instead of malloc'ing (as in memory.c) . So Are there any methods to support Huge Pages in "R" ? Can any one give some inputs to help me implementing this feature? [[alternative HTML version deleted]]

Hi R-Developers, I'm working on running statistical analyses with embedded R from a Qt-GUI-application (C++). I've been able to link with R libraries, but I'm having a hard time to understand the C-coding examples. I'm a C++, not a C programmer (never used malloc before), and many of the R-specific functions/keywords/macros (for instance (UN)PROTECT, SETCAR, all the

Hi I have a question (which may be an obvious one). It is about an idiom which I have seen quite often: o <- order(x); <- x[o] vs. the alternative x <- sort(x) I am just wondering as to the rationale behind the order/reindex idiom vs sorting. Especially as there seems to be a marked performance difference (especially for integer vectors): > x <- trunc(runif(1E6, 1, 100)) >

Hi,   It may be the old question. can anyone tell me how to call perl in R? thanks   Y.     [[alternative HTML version deleted]]

I''m trying to attach effects to elements in my onload handler and my lack of Javascript-fu is showing... I want to call the effect from the onclick handler of an anchor inside the div I want the effect to apply to. Here''s what I''m trying to do: function doOnLoad() { var filters = document.getElementsByName(''filter''); for

Hello R-devel, I want to write extensions for R in C (maybe C++ and Fortran later) and it works fine, but there is one problem, which I cannot solve (in my view). I want to handle a matrix from R in C. For arrays there is "as.double(...)", but nothing for a matrix. I searched a while, but didn't find something. Last I looked at the source code of e1071 and of the core itself and

Has anyone done much work with server-side push and AJAX/J? (XML or JSON) As best I can tell, the ideal solution to this would be the multipart/x-mixed-replace MIME type. Mozilla''s XMLHttpRequest now has support for this, so this is on people''s minds, but how to make it work on the server end? You have to keep a connection open.....and a process on the server to go with it.