Displaying 20 results from an estimated 3000 matches similar to: "Connecting to MS Access database"
2006 Jun 23
3
R connectivity to database
Hello, does anyone know how I would go about getting R to connect to OpenOffice's Base program (OOo's version of MS Access) such that I can retrieve data from the database and perform calculations and data analysis? I'm totally new to R and Base and I've looked at some documentation, but found only examples for R connecting to PostgreSQL and MySQL, but nothing for OOo's Base
2007 May 31
2
Import data from Access
Hi, I want to import some data from Access and I am using the following
codes:
testdb <- file.path("c/../db1")
channel <- odbcConnect("testdb")
sqlFetch(channel,"tbl",colnames = TRUE, rownames = FALSE)
It comes out the error message:
1: [RODBC] ERROR: state IM002, code 0, message [Microsoft][ODBC Driver
Manager] Data source name not found and no default
2012 Feb 24
1
looping over string of frames when importing with 'sqlFetch' from a Microsoft Access database
Dear R-list,
I am trying to import (all) frames from a Microsoft Access database as individual data frames in a fancy loop, but I'm having troubles figuring out how to use the 'sqlFetch' from the RODBS package in a loop (mostly because I can't figure out how to loop over elements (I came from stata)
I would very much appreciate if anyone on the list could help me solve this
2009 Nov 18
3
Re ading multiple Excel 2007 files with a loop
I have several hundred Excel 2007 data files in a folder. I would like to
read every file in a single given folder using a loop.
I have searched the FAQ, the forum archives here, other or older R boards
and the R Import / Export documentation, and have asked some very
knowledgeable R users without learning of a solution. I hope someone here
can help.
I understand that the most common
2006 Oct 18
2
sqlSave, fast=F option, bug?
Hi,
Using the fast=F option, sqlSave saves without matching column names.
It looks like a bug to me..........
Here's a simple (artificial) example.
-----------------------------------------
Create a dataframe and save it to a database table "test" as follows:
df <- data.frame(T=1, S=10)
sqlSave(channel, df, "test", rownames=F)
The table now looks like
T S
1 10
If
2007 Mar 06
2
Package RODBC
I have some questions about the RODBC package.
library(RODBC) # required for those who want to repeat these lines
1st, I noticed that the following sequence does not work:
channel <- odbcConnextExcel("test.xls")
tables <- sqlTables(channel)
name1 <- tables[1, "TABLE_NAME"] # this should be the name
plan1 <- sqlFetch(channel, name1) # bang!
2011 Feb 10
2
Rioja package, creating transfer function, WA, "Error in FUN"
Hi, I am a new R user and am trying to construct a palaeoenvironmental
transfer function (weighted averaging method) using the package rioja.
I've managed to insert the two matrices (the species abundance and the
environmental data) and have assigned them to the y and x values
respectively. When I try and enter the 'WA' function though, I get an 'Error
in FUN' message (see
2012 Nov 26
2
puzzling RODBC error
Dear all,
I'm trying to connect to an MSAccess database (ArcGIS personal geodatabase). I keep getting an error about the channel when using sqlQuery(). However, sqlTables() does not complain about the channel and lists all tables in the database. If I try sqlFetch(), then R crashes.
I'm happy to hear suggestions on how to solve this.
Best regards,
Thierry
> MDB <-
2006 Mar 18
1
The R "fork"
Hello, I would like to call a function that can take infinite time to
be executed in some circumstances (which can not be easily detected).
So, I would like that once the function is being executed for more
than two seconds it is stopped. I have found documentation for timers
but i did not found how to "kill" a function. Moreover, I would like
not to change the function code (it should
2007 Apr 19
2
element search
Dear R-experts,
I have got an excel file as attached. I imported it successful with the
commands:
library(RODBC)
channel <- odbcConnectExcel("data2.xls")
tables <- sqlTables(channel) # list the names of the spreadsheets
name1 <- tables[1, "TABLE_NAME"] # get the name of the 1st spreadsheet
plan1 <- sqlQuery(channel, sprintf("select * from [%s]",
2007 Aug 14
4
Import of Access data via RODBC changes column name ("NO" to "Expr1014") and the content of the column
Dear all,
I have some problems with importing data from an Access data base via
RODBC to R. The data base contains several tables, which all are
imported consecutively. One table has a column with column name "NO". If
I run the code attached on the bottom of the mail I get no complain, but
the column name (name of the respective vector of the data.frame) is
"Expr1014" instead
2010 Jun 10
2
panel.abline {lattice} help
Hi All,
I need a small help plotting median lines on lattice boxplots.
# Data
a <- rep(c("A","B"), each=10)
b <- rep(c("a","a+b","b","b+a"), each=5)
c <- c(1,9,5,2,7,7,8,8,8,5,4,5,3,2,5,6,7,8,9,1)
x <- data.frame(a, b, c)
med.A <- median(subset(x$c, x$a=="A"))
med.B <- median(subset(x$c, x$a=="B"))
2010 May 13
3
Multiple plots; single x(y) labels
Hi All,
Can anyone please help me with getting a single x and y-axis label while
plotting muliple plots. Here is the code:
par(mfcol=c(2,2))
plot(x <- sort(rnorm(7)), type = "s", main = "", ylab="", xlab="")
plot(x <- sort(rnorm(27)), type = "s", main = "", ylab="", xlab="")
plot(x <- sort(rnorm(47)), type =
2009 Dec 05
1
Forest Plot
Hi All,
I want to produce a similar "Forest Plot" as it is on the following link,
but my data would be having only two columns (one for "Estimate" and other
for "Std. Dev"). Can anyone suggest some function() {Package} which can take
such file as an input and give following forest plot:
2010 May 26
1
forest() in {metafor} :: edit labels
Hi Kim and Others,
Can anyone please help me on how can I edit default labels ( "Study 1",
"Study 2",...)
using forest() - same question as below. Which option I should try?
It would be a great help. Thanks in advance,
On Sun, Dec 13, 2009 at 7:14 PM, Kim Jung Hwa <kimhwamaillist@gmail.com>wrote:
> Hi All,
>
> I'm using forest() from metafor package to
2011 Apr 27
1
Reading file
Hi all,
I am trying to read Excel file usingthe follwoing commnad
library(RODBC)
data=odbcConnectExcel(file.choose())
sqlTables(data)
Bdat=sqlFetch(data, "test")
odbcClose(data)
head(Bdat)
1. The above script works if the Excel file is opened. If the excel file is
not opened then I get the following message "External table is not in the
expected
2009 Oct 28
1
replacing <NA> in character column
I have a small Excel data file with two columns of character variables, one column with a numeric variable and three rows. One of the character cells is blank and one of the numeric cells is blank.
I read the data file with the following code:
library(RODBC)
channel <- odbcConnectExcel('u:/test.xls')
sqlTables(channel)
s1 <- sqlFetch(channel, "Sheet1")
2010 Feb 05
2
number of Excel worksheets
Dear All,
I would like to count or list the names of the existing worksheets
within an .xls file. Any hints?
Thaks,
Gabor
--
Pozsgai G?bor
www.coleoptera.hu
www.photogabor.com
2005 Jun 22
10
How to read an excel data into R?
Hi all,
Does anybody know the easiest way to import excel data into R? I copied
and pasted the excel data into a txt file, and tried read.table, but R
reported that
Error in read.table("data_support.txt", sep = " ", header = T) :
more columns than column names
Thanks!
Ling
2009 Dec 08
3
re-ordering x-lables using barchart()
Hi R Users,
I'm trying to re-order the "site names" ("Waseca", "Morris", ...). I'm using
following code:
libarry(lattice)
barchart(yield ~ variety | site, data = barley,
groups = year, layout = c(6,1), aspect=.7,
ylab = "Barley Yield (bushels/acre)",
scales = list(x = list(abbreviate = TRUE, rot=45,