Displaying 20 results from an estimated 5000 matches similar to: "putting reference lines or grids into the background of a plot"
2003 Jul 09
2
RODBC and Oracle: error "table does not exist"
Dear r-helpers!
I have trouble reading data from an Oracle data base using
RODBC Version 1.0-3,
R Version 1.7.1,
Windows XP,
Oracle8 ODBC Driver Version 8.1.6.4.0:
> library(RODBC)
> channel <- odbcConnect(dsn="PAV32", case="oracle", believeNRows=FALSE)
> # ok, this was succesful
> x <- sqlTables(channel)
> x[37, ]
TABLE_CAT TABLE_SCHEM TABLE_NAME
2003 Aug 27
4
read.spss (package foreign) and character columns
Dear R users!
I am using R Version 1.7.1, Windows XP, package "foreign" (Version: 0.6-1),
SPSS 11.5.1.
There is one thing I noticed with "read.spss", and I'd like to ask if this
is considered to be a feature, or possibly a bug:
When reading character columns, character strings seem to get filled with
blanks at the end.
Simple example:
In SPSS, create a file with one
2002 Jun 12
2
data mining: finding association rules
Dear R-users!
I would like to search for "association rules" (and compute support and
confidence, for example) in a data set, and wonder if this can be done with
R (version 1.5.0 for Windows)?
Particulary, I wonder if
a) anyone has done something like that with R
or
b)maybe someone has written an R-interface to some existing
algorithm/software (e.g. to something like the
2009 Sep 02
4
within: order of newly added variables
Dear R community,
I am using function 'within' in R.2.9.1 to add variables to an existing data.frame. This works wonderful, except for one minor point: The new variables are added to the data in reverse order.
For example:
x <- data.frame(a = 1:3, b = 4:6)
y <- within(x, {
c = a^2
d = b^2
e = c+d
}
)
gives
a b e d c
1 1 4 17 16 1
2 2 5 29 25 4
3 3 6 45 36 9
2010 Oct 28
2
replace text at certain positions in a file
Hello,
I am working with R version 2.10.1 under windows.
In a text file, I need to replace all characters at certain column positions with blanks.
For example, say the file contains two lines and looks like this:
ab34cd78e
fg3 hi78j
I'd like to replace everything at positions 3-4 and 7-8 with blanks, so the output should be:
ab cd e
fg hi j
[I'm not sure if this is really an R
2003 May 14
2
number of patients in a hospital on a given date
Dear R-users!
I am using R 1.7.0, under Windows XP.
Having some hospital discharge data (admission date and discharge date for
each patient), I want to get the number of patients in the hospital on a
given date.
My data look like (simple example):
> x <- data.frame(patid=c("pat1", "pat2"), adm.date = c("15.03.2002",
"16.03.2002"),
2010 Jan 26
2
tapply and more than one function, with different arguments
Dear R-users,
I am working with R version 2.10.1.
Say I have is a simple function like this:
> my.fun <- function(x, mult) mult*sum(x)
Now, I want to apply this function along with some other (say 'max') to a simple data.frame, like:
> dat <- data.frame(x = 1:4, grp = c("a","a","b","b"))
Ideally, the result would look something like
2007 Apr 05
1
read.spss (package foreign) and SPSS 15.0 files
Hello,
does anyone have experience with reading SPSS Version 15.0 files into R (version 2.4.1, WinXP)?
I have long been sucessfully reading SPSS files with read.spss from the wonderful foreign package, but somehow after upgrading from SPSS14 to SPSS15 I seem to have problems.
Trying a simple example, where test.sav is a SPSS 15.0 data file consisting of x1=c(1,2,3) and
2009 Dec 02
2
lattice: adding information on number of observations
Dear R-users,
I am using R version 2.9.1 and lattice 0.17-26 under windows.
In a lattice boxplot, I would like to add information on how many observations each singel boxplot is based upon.
For example (the basic plot):
# Begin R-code
library(lattice)
dat <- data.frame(panvar = rep(c("A","B","A","B"), c(3,7,4,6)), grp = rep(c("grp1",
2001 Jan 05
2
running Rcmd INSTALL, again
Ok, one last try. R1.2.0, WinNT 4.0:
[R is installed in: R_HOME=D:\Programme\R\rw1020]
Can anyone give a hint what the following error message (when running Rcmd
INSTALL) means and what to do about it?
cd D:\Programme\R\rw1020\src\library
D:\Programme\R\rw1020\bin\rcmd install testfunctions
make: Entering directory `/cygdrive/d/Programme/R/rw1020/src/gnuwin32'
dlltool -k --as as --dllname
2003 Jul 21
3
R commands from a text file ?
Hello
I was wondering if it was possible to enter R commands from an external
text file. If it is possible, it will be easy for repetetive tasks.
Does anyone have an idea ?
thanks in advance
Ahmet Temiz
TURKEY
______________________________________
______________________________________
The views and opinions expressed in this e-mail message are ...{{dropped}}
2001 Feb 26
1
"untable" function
Dear R-users!
I am using R1.2.0 under Windows NT4.0, and have data of the following form:
> #simple example of data structure:
> x <- data.frame(group=LETTERS[1:3], class1=1:3, class2=4:6)
> x
group class1 class2
1 A 1 4
2 B 2 5
3 C 3 6
I would like to convert this to a data.frame y of the following form:
> y
group class counts
1
2003 Nov 14
5
ISOdate() and strptime()
Dear R-people!
I am using R 1.8.0, under Windows XP.
While using ISOdate() and strptime(), I noticed the following behaviour when
"wrong" arguments (e.g., months>12) are given to these functions:
> ISOdate(year=2003,month=2,day=20) #ok
[1] "2003-02-20 13:00:00 Westeurop?ische Normalzeit"
> ISOdate(year=2003,month=2,day=30) #wrong day, but returns a value
[1]
2000 Jun 15
1
proportions - finite population correction
> Dear R-users!
>
> I am using R 1.0.0 and Windows NT 4.0.
>
Suppose I have a population of N=100 subjects, a binomial variable and a
random sample of n=20 subjects from my population, giving 15 "successes". I
am interested in obtaining a confidence interval for the proportion of
"successes" in my population.
In R, I can use
> library(ctest)
>
2010 Jan 12
1
barplot: border color when stacked
Dear R-users,
I am using R version 2.10.1 under windows.
In a barplot, I want to mark one of the bars with a special border color.
For example:
barplot(c(3, 7, 11), border = c(NA, "red", NA))
But how to do this when the bars are stacked?
for example:
barplot(matrix(1:6, ncol=3)) # border of second bar (i.e. the one with total height = 7) should be red again, I try:
barplot(matrix(1:6,
2001 Jan 05
2
AW: running Rcmd INSTALL, again
Indeed, there is no file named "dlltool" anywhere around here!
So, at last I am beginning to suspect that my collection of tools is
incomplete.
What I have got is "rw1020sp.zip" and
"http://www.stats.ox.ac.uk/pub/bdr/RWin/tools.zip". These are properly
istalled, I think.
readme.packages says "If your package has no C nor Fortran nor C++ sources,
see `Simple
2003 Jun 18
2
downloading packages and AntiVirus program
Dear R-users!
I am using R 1.7.0, under Windows XP;
I also have Internet Explorer 6.0.2600.0000, Norton AntiVirus 7.60.926.
Our firewall seems to want to "protect" me from downloading precompiled
packages for Windows.
When I try to download packages, like
http://cran.at.r-project.org/bin/windows/contrib/1.7/RODBC_1.0-3.zip
for example, I am not allowed to and get a message like this:
2000 Dec 29
2
how to create help files
Dear R users,
this is a question for R version 1.2.0 under Windows NT 4.0, regarding the
documentation of ones own functions.
I have ceated a private library for my functions, which works all very well,
apart from that I am not able to create appropriate help files.
For illustration, here is a simple example of where I'm stuck:
> # first, create a simple function f1:
> f1 <-
2005 Sep 09
2
adding text to the corner of a lattice plot
Dear R community,
I am using R 2.1.1 on Windows XP, package lattice Version 0.12-5, and
want to add text (sort of a dat-stamp actually) to the lower left corner
of a lattice plot, prefarably _after_ the plot has been created.
Here is a simple example what I do in base graphics:
# base graphics:
> plot(rnorm(100), rnorm(100))
> mtext(as.character(Sys.Date()), side = 1,line = -2, outer = T,
2001 Jan 18
2
dotplot: character size of labels
Dear R users,
using dotplot (R1.2.0, WinNT4.0), I am trying to change the character size
of the labels of the points:
> # example
> data(VADeaths)
> dotplot(VADeaths, main = "Death Rates in Virginia - 1940")
> # I'd like to have smaller character size of the labels (for age and
population groups)
> ?dotplot
> # for argument "cex", this says: