similar to: R servlet engine ?!!!

Hi, all; Our group is planning to develop a web-based analysis package with R. I have some questions. (1) Can we use R as a daemon-like way such that, after invoking R and making it run in a kind of background mode, just put some R script into R using some pipe-like mechanism and retrieve the result out of it? (2) If this is possible, then how can we do it? If this is not possible, then what

I have released the new module Statistics::R and need some feedback of it's status. This will permit the control of the the R (R-project) interpreter through Perl in different architectures and OS. You can for example, start only one instance of the R interpreter and have different Perl process accessing it. What will save the initiation time of R and memory. Soo, I will appreciate if some

Dear R-Help, Does anyone know of a way to use CGIwithR in Windows? David Firth the author of CGIwithR states "It ought to be possible to adapt it for use also in conjunction with web servers running under Windows NT ... but the author has no plans for that." I have developed some applications in R that I would like to make available through a web interface using CGIwithR but at this

Dear alltogether, I want to use CGIwithR in conjunction with R2HTML. A small example called 'test.R': ##### #! /usr/bin/R invisible(capture.output(library(R2HTML))) HTML(summary(as.numeric(scanText(formData$numbers))), file=stdout()) ##### The script gets its input via 'CGIwithR.cgi' and contains the variable "numbers." The 'HTML' output (-> summary() in

<headline>Short question</headline>: Do people have advice on debugging R programs running after CGIwithR inputting of data from forms? Is there a way of setting up fast local versions if your local machine has to be a windoze (2k) machine (R 2.1.0) and your server is a Debian, ssh shell only set up running R 1.8.0? Are there simple guides to ways of not having to invoke R each

Hi, I have a (maybe stupid) question... Does CGIwithR package can be installed in R for Windows to work with a Microsoft IIS web-server? Or I need other libraries? Thank you, Gianluca.

I built R 2.2.0 from source on my debian machine yesterday and updated all packages. My problem is that "dates" function from its, that my code heavely uses is now masked by "dates" from chron. How can I specify tehat I want to use dates from its or how can I prevent it from being masked? > library(its) Loading required package: Hmisc Hmisc library by Frank E Harrell Jr

I use POSIXct for datetimes. Is thee a timeAlign function that I can use where : align by year direction -1 ==> start of this year direction 1 ==> start of next year align by week direction -1 ==> date on last sunday direction 1 ==> date on next sunday align by day direction -1 ==> time at past midnight direction 1 ==> time at this comming

Can this be re-implemented to run faster (without the loop) ? r <- list() n = nrow(prices) for (i in (w+1):n) { window <- prices[(i-w):(i-1),] if (prices[i,]$settle > max(window$high)) r <- append(r, 1) else if (prices[i,]$settle < min(window$low)) r <- append(r, -1)

I want to generate a sequence from 1 to x by 1 seq(1,x,by=1) I want the above to return an empty list if x is zero In other languages I can do 1:x:1 to force the increment by to be a positive 1. This syntax does not work in R. In R 1:x gives me 1 0 when x is zero, this is not what I want. The seq statement above throws an error when x is 0. How can I generate a sequence where if the

tmp <- c(-1,NA,NA,1,1,NA,NA,1) without using a loop, how can I replace all NAs in the list above with the previous none NA value in the list?

This may be more of an OS question ... I have this call r = get.hist.quote(symbol, start= format(start, "%Y-%m-%d"), end= format(end, "%Y-%m-%d")) which does a url request in a loop and my program runs out of file handlers after few hundred rotations. The error message is: 'Too many open files'. Other than increasing the file handlers assigned to my process, is there

I have prices that I am finding difficult to compare with ==, > and >, due to precision. For example: the numbers should match, with '==', but they differ in the magnitude of 1e-14 due to bunch of calculations that I run on them. Programming with java, I am used to implementing a function that compares the difference between the numbers to a pre determined precision factor. This

Hello list helpers, I'm working at a research institute and I've been asked to develop a way of using R as a scripting and analysis tool which takes information from users via web forms, perform a query to an Oracle Database running on a Linux server and finally return formatted reports to the user via web. I'm sort of a newbie in web forms and web services so i've been reading

Hi, I am having trouble to make the CGIwithR work in my server (Linux RedHat 7 - Apache), I installed the package, edited the R.cgi archive, but when I try to run any script from the browser I receive the following: Error message: Premature end of script headers: trivial.R Need I change some configuration of my system so that scripts work? Cris

I prefer to use R on a linux box and ultimately need things to end up there to serve things up using David Firth's excellent CGIwithR and apache, but one step at a time and I've installed 1.8.1 under win2k. Another question that I'm sure is simple: is there a simple way to find the list of installed libraries I had in my 1.7.1 installation and use that to drive install.packages?

Dear R users; I'm trying to use CGIwithR on a linux machine, I have followed the instructions on the package manual but still it does not run, the message that I get is as follows: The requested URL was not found on this server I used the example trivial, I put trivial.html under Web directory and trivial.R in cgi-bin directory, which itself is a subdirectory of Web directory, ( I have

This is a eaeir way to ask my prior question: I want to caculate how many an exact day of the month there is between two dates. For example; How many 7th of the month is there between "1998/12/17" and "2000/1/7". To make the problem simple, the day of the month (7) is the day in the 2nd date.

> r [1] open settle <0 rows> (or 0-length row.names) > class(r) [1] "data.frame" this is an empty data.frame I get back from a sql statement that returns an empty result set. How can I create such an empty data.frame using the data.frame() constructor? I want to have a data.frame with 0 rows but named empty columns. Thanks in advance for any help.

Can someone, please, explain the difference is results below (notice the isdst value) > unlist(as.POSIXlt('2005-7-1')) sec min hour mday mon year wday yday isdst 0 0 0 1 6 105 5 181 1 > unlist(as.POSIXlt(as.Date('2005-7-1'))) sec min hour mday mon year wday yday isdst 0 0 0 1 6 105 5 181 0