similar to: getConnection, R_outpstream_st

I was wondering if there was a function like "does connection exists" ? I am currently using loops to build up a database, and I have either > B = getConnection(localization) Error in getConnection(localization) : there is no connection -2147483648 In addition: Warning message: In getConnection(localization) : NAs introduced by coercion or > B = scan(localization) Error in

Hi, I use the functions socketConnections() and getConnection() which are working fine. Thanks to the authors. After opening nicely some socketConnection, getConnection(3) returns something like : description class mode text opened can read can write "->127.0.0.1:7496" "socket" "wb" "binary" "opened" "yes"

Hello all, I would like to request that getConnection() and the struct Rconn declarations be added to the R embedded interface. Here's why. It's common in CGI scripts for web applications to direct stdin, stdout, and stderr map to reading from the browser, writing to the browser, and writing to a web log file respectively; very nice and neat. However, things get a little hairy once

Hello R developers, I am working on the "seqinr" package and I encounter a tricky problem using a C function. We defined a C fonction called "getzlibsock" which is dedicated to compressed socket connections. This function is using the R internal C function called "getConnection(int)" in order to get information about the socket previously opened with the

When I originally implemented connections in R 1.2.0, I followed the model in the 'Green Book' closely. There were a number of features that forced a particular implementation, and one was getConnection() that allows one to recreate a connection object from a number. I am wondering if anyone makes use of this, and if so for what? It would seem closer to the R philosophy to have

Thought I'd try and start a discussion. Feel free to jump in. I guess R needs to strike the right balance between opening up the internals to package writers and not allowing them to do bad things. My first attempt at cracking this nut is to just memcpy() the Rconnection and not allow access to the private stuff: /* Alternative to allowing C code access to connection API. */ Rconnection

As far as I can tell, 'isOpen' cannot return FALSE in the case when 'rw = ""'. If the connection has already been closed by 'close' or some other function, then isOpen will produce an error. The problem is that when isOpen calls 'getConnection', the connection cannot be found and 'getConnection' produces an error. The check to see if it is

I have been experiencing issues with an R script hanging when connecting to an Oracle database. To help debug, I found a function here in the nabble forum and made a small test script: #!/usr/bin/Rscript --no-restore --no-save --no-init-file library("RJDBC") drv<-JDBC("oracle.jdbc.OracleDriver","/home/oracle/lib/ojdbc6.jar", "'") dbCheck =

I am trying to use R interfaced with MySQL. Present goal is that R should calculate the 85% quantile of AvgSpeed for each LinieID. Looking through documentation of the RMySQL Package, I guessed that dbApply would do the trick due to this example ## compute quanitiles for each network agent con <- dbConnect(MySQL(), group="vitalAnalysis") res <- dbSendQuery(con,

Hello Community, I am installing a domU image via virt-install. However, it seems that a driver needs to be installed for the connection as I saw an error while running the command. Can anyone give any hints about this error? Here is the running script: # virt-install --connect=xen:/// -p -d Thu, 15 Mar 2012 10:17:55 DEBUG Launched with command line: /usr/bin/virt-install --connect=xen:///

Hello Community, I am installing a domU image via virt-install. However, it seems that a driver needs to be installed for the connection as I saw an error while running the command. Can anyone give any hints about this error? Here is the running script: # virt-install --connect=xen:/// -p -d Thu, 15 Mar 2012 10:17:55 DEBUG Launched with command line: /usr/bin/virt-install --connect=xen:///

On Thu, Dec 14, 2017 at 7:56 PM, Gabriel Becker <gmbecker at ucdavis.edu> wrote: > Gabor, > > You can grab the connection and destroy it via getConnection and then a > standard close call. Yeah, that's often a possible workaround, but since this connection was opened by readLines() internally, I don't necessarily know which one it is. E.g. I might open multiple

SUMMARY: I'm proposing that R assert that 'connection' options have not changed since first created such that R will produce the following error: > fh <- file("a.txt", open = "w+") > cat("hello\n", file = fh) > close(fh) > fh2 <- file("b.txt", open = "w+") > cat("world\n", file = fh2) >

Consider this code. This is R 3.4.2, but based on a quick look at the NEWS, this has not been fixed. tryCatch( readLines(tempfile(), warn = FALSE)[1], error = function(e) NA, warning = function(w) NA ) rm(list=ls(all.names = TRUE)) gc() showConnections(all = TRUE) If you run it, you'll get a connection you cannot close(), i.e. the last showConnections() call prints: ?

Hi all, I installed Xen 3.4.0 on RH5.3 from the source, It is working fine (Dom0), but when i tried to create new guest (hvm) by the virt-install i got the next message: Wed, 23 Sep 2009 12:02:15 ERROR virConnectOpen() failed Traceback (most recent call last): File "/usr/sbin/virt-install", line 560, in ? main() File "/usr/sbin/virt-install", line 348, in main

Hello, i installed a Xen 3.3 on Fedora 7 successfully I booted system with xen 3.3. checked using the command uname -r but while starting xend i will get an error please help me out this... error is as: ImportError: /usr/lib/python/xen/lowlevel/xs.so thanks in advance _______________________________________________ Xen-users mailing list

I am new to Ruby/RoR and would appreciate any help on the issue I am trying to resolve far past 2 days. I have a java application as a jar and I have included in the controller as below. require ''java'' require ''C:/Documents and Settings/user/Desktop/application.jar'' include_package ''whatever.something'' After that I am calling a method

Hello, I seem to have issues with setting the driver: My code: library(RJDBC) getStatic <- function() { # set driver driverClass <- JDBC("com.ibm.db2.jcc.DB2Driver","someClassPath.jar","'") conn <- dbConnect(driverClass,"serverName") etc etc } I get this error > data <-getData()

I have 3.4.2 Dom0(kenel 2.6.31-rc6) on top of fedora11 xend has started [root@HPCNL-SR-2 xen]# xm list Name                                        ID   Mem VCPUs      State   Time(s) Domain-0                                     0  7607     8     r-----    232.6 But i am unable to create PV guest in anyway. my virt-manager not working if i clicked its launcher in system tools. Even while using

I am having problem in guest creation for a pv-ops Dom0 kernel I compiled every thing from scratch.(Xen and 2.6.32.27 pv-ops dom0 kernel) on a Ubuntu Desktop 10.04 64 bit. Following is my config file for 2.6.32.27 http://pastebin.com/AvSVgVQE and the error I am getting trying to create a guest with virt-install is ERROR unable to connect to 'localhost:8000': Connection refused