similar to: generic database access methods

one more bit of information about this problem. If I start R as the user "postgres" i dont have the segmentation fault. ---------- Forwarded message ---------- Date: Wed, 5 Feb 2003 19:19:39 -0500 (EST) From: Rafael A. Irizarry <ririzarr at jhsph.edu> Reply-To: rafa at jhu.edu To: "R-Help (E-mail)" <r-help at r-project.org> Subject: rdbi segmentation fault hi! i

Hi, I'm experimenting with using (R)SQLite to do data management. Here are two little problems that I've encountered: 1. The presence of ',' in string values causes trouble since ',' is also the delimiter used in the SQL statement. 2. A newline '\n' line attached to the last string value of each row. Some examples: > library (RSQLite) Loading required

A consensus seems to emerge : R would excel to exploratory work on small/middle-sized datasets, while SAS would be able to munch much larger datasets. However, I see the "size" problem as a red herring. The objects that have to stay "in core" are usually much smaller than the dataset. For example, for problems involving fixed-effects linear models, you need only some

On Sun, 2009-07-26 at 13:17 +0200, Poersching wrote: > stvienna wiener schrieb: > > Hi all, > > > > I am plotting a financial time series, but I need a more detailed X-Axis. > > > > Example: > > x <- zoo(rnorm(1:6000), as.Date("1992-11-11")+c(1:6000)) > > plot(x) > > > > The X-Axis is labeled "1995", "2000"

Hi, I just installed ROracle and RDBI. The connection to the database seems to work also. My problem is when I am selection rows that really exist in the database, it is returning nothing. Where should I look to see what could be my problem? Thank you very much, Mathieu > drv <- dbDriver("Oracle") > summary(drv, verbose=TRUE) <OraDriver:(6721)> Driver name:

Good day, I read some data from a PostgreSQL database by a following script: library(Rdbi) library(RdbiPgSQL) # conn becomes an object which contains the DB connection: conn <- dbConnect(PgSQL(), host="localhost", dbname="BVS", user="postgres", password = "*******") query_duj_kal <- dbSendQuery(conn, "select zdroj as well, cas as date, fe2,

---------- Forwarded message ---------- From: Moumita Das <das.moumita.online@gmail.com> Date: Sat, May 16, 2009 at 2:26 PM Subject: Cannot allocate a new database connection error To: r-help-request@r-project.org Hi friends, why do i keep getting this error?The program runs, twice and every third time i get this error.I have to quit.Again get teh R-prompt and then run the script. *Error

I have been using RODBC for a while with no complaints (R 2.0.1 patched under WinXP), then I saw a link (http://grass.itc.it/statsgrass/r_and_dbms.html) showing that Rdbi claims to run a query in 5 seconds that takes RODBC 4.3 minutes. That was hard enough for me to believe that I wanted to try some tests myself, but I cannot get Rdbi to connect to my ODBC database. Here is what works for RODBC

hi! i am experiencing the same behaviour explained here: http://finzi.psych.upenn.edu/R/Rhelp02/archive/2482.html (i copied the message below) has anybody found a solution? here is the code that gives me a segmentation fault library(Rdbi) library(Rdbi.PgSQL) conn <- dbConnect(PgSQL(), dbname = "PGA") tmp <- "create table test ( expid int, name varchar(128));"

I usually work with R on a windows querying data through RODBC from a postgresql db on a freebsd machine on my offcie lan. Now I have the chance to use R also on a linux gentoo client box and to connect to the same db. I know that I can install the unixodbc stuff and stick to RODBC, BUT my question is: Is there any more 'linuxish' way of querying a postgresql server from a client?

I got the following after running succesfully through this loop 28 million times... the loop opens text files in a directory and inserts line by line into a database... *** caught segfault *** address 0xc0000010, cause 'memory not mapped' Traceback: 1: .getGeneric(f, where, package) 2: getGeneric("coerce", where = where) 3: as(obj, "integer") 4:

I can use the Rdbi package to connect to a PostGreSQL server fine but when I use the dbDisconnect(), I get a segmentation error and it throws me out of R. I'm using RH7.2, R1.4.1, Rdbi 0.1-2, and Rdbi.PgSQL 0.1-2. Anyone else seen anything like this and have an possible answer? Andrew Schuh -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing

R-help list, I ported some R code from MS Windows PC to sun-solaris. Both do queries on the same MySQL database. PC version of R is 1.6.1 and solaris version is 1.6.0. I use RMySQL_0.5-0 (on solaris) and RODBC 1.0-1 on PC to connect to MySQL. The PC version took about 65 mins. to run wheras the Solaris (SunOS 5.7) version took 375 mins. (> 6 hrs). R and RMySQL are resident on the same host

Hi, I would like to be able to use R with a connection to a PostgreSQL database. I am using R 2.0.1 on windows XP. I have tried installing both the DBI and rDBI packages (which is better?) but in either case I run into the same problem - when i try to use either the dbDriver or dbConnect functions i'm told the function couldn't be found. Seems like the packages aren't installing

I don't use MySQL but I have seen messages like this before. They often have replies which indicate that you need to follow the instructions more closely. I suggest you search the list for these previous posts as I'm sure there is help there, somewhere! Tom > -----Original Message----- > From: Adriano von Sydow [mailto:pdasilva at xtra.co.nz] > Sent: Thursday, 10 March 2005 5:13

I'm having trouble getting RMySQL to load. I was able to build it and install it (RMySQL_0.5-11.tar.gz). I was also able to build and install mysql-5.0.37. I've read many postings about this but have not found a mention of my particular problem (some closely related). I get the "unable to load shared library, no such file" error, but all the files do exist, RMySQL.so and

R HELP, I am trying to use an R script to connect to a mysql database. I am having a problem using a variable in the where clause that contains a "space" in its value. If I include the variable inside the quotes of the query - i think it is searching for the name of the variable in the database and not the value of the variable. If I put it outside the quotes, then it complains

If do something like this: dbObj = MyTable.find_by_id(5) a = dbObj.name b = dbObj.name How many times will an SQL call be made to get the value of MyTable.name for id 5? In other words, are the values for dbObj cached in the object? Is there a way of controlling that? (I can imagine that sometimes you might not want to cache them if you wanted to be sure of having the latest

Dear R-Users, I need a very fast and reliable database solution so I try to serialize a data.frame (to binary data) and to store this data to an SQLite database. This is what I tried to do: library(RSQLite) con <- dbDriver("SQLite") db <- dbConnect(con, "test") dbSendQuery(db, 'CREATE TABLE frames("simID" INT, "data" BLOB)') data.bin <-

Hello, I've been trying every now and then to find a cross operating system solution that would let me access PostgreSQL (and PostGIS) from R, or to access R from PostgreSQL. I know of pl/r, which accomplishes the latter, but has yet to be successfully ported to Windows. Similarly, I've tried to use Rdbi and DBI, but I haven't had luck with those on Windows either for connecting to