Displaying 20 results from an estimated 6000 matches similar to: "Summary R 1.9.0, special characters in variable names."
2004 Jun 24
3
R 1.9.0, special characters in variable names.
Hello all,
I upgraded from R 1.8.1 to 1.9.0 (Windows XP), and spotted an odd thing.
The last three letters in the Swedish alphabet are ??, ?? and ??. (In case they don't show correctly: they are a with a ring, a with two dots, and o with two dots (HTML: å ä ö).
When I use these as variable names in a data.frame, odd things happen:
In R 1.8.1, ?? (å)
2003 Sep 17
5
Quit asking me if I want to save the workspace!
How do you stop R from putting up a dialog box when you quit Rgui?
(I use Windows and I never save workspaces that way)
Murray
--
Dr Murray Jorgensen http://www.stats.waikato.ac.nz/Staff/maj.html
Department of Statistics, University of Waikato, Hamilton, New Zealand
Email: maj at waikato.ac.nz Fax 7 838 4155
Phone +64 7 838 4773 wk +64 7 849 6486 home
2003 Dec 30
4
Assignments in loops
Greetings all. Any help with the following would be appreciated.
I want to create a data frame for each file in a directory. The following
code does not work but it may show what I am trying to do:
carmakes <- c('BMW','Chrysler','Citroen','Fiat','Ford','Holden','Honda',
2003 Aug 20
5
Interlacing two vectors
I want to interlace two vectors. This I can do:
> x <- 1:4
> z <- x+0.5
> as.vector(t(cbind(x,z)))
[1] 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
but this seems rather inelegant. Any suggestions?
Murray
--
Dr Murray Jorgensen http://www.stats.waikato.ac.nz/Staff/maj.html
Department of Statistics, University of Waikato, Hamilton, New Zealand
Email: maj at waikato.ac.nz
2003 Sep 23
2
R-project [.com?] [.net?]
I got a shock a few days ago when I accidentally visited
www.r-project.com . I thought that the r-project site had been hacked
until I realised my mistake. There is also a site www.r-project.net.
Both of these sites appear to be Japanese. Does anyone know anything
about them? I suppose that it is not unusual for names close to those of
popular sites to be used. It is good that they use a
2004 Apr 21
2
Rgui front-end has encountered a problem and needs to close
Well I don't know if anyone can help with this but it will be
interesting to know if others have had the same problem.
I can't start R at home on my laptop [ I'm using 1.8.1 under Windows
XP]. When I click on the shortcut I get the usual Windows box for when
an application needs to close. A couple of clicks down it displays the
following:
Error signature
AppName: rgui.exe
2004 Jul 07
6
text editor for R
Hi,
What is the best text editor for programming in R? I am using JEdit as the
text editor, however, it does not have anything specific for R. It will be
nice to have a developing environment where the keywords are highlighted,
plus some other debugging functions.
Yi-Xiong
[[alternative HTML version deleted]]
2004 Apr 24
5
Modalwert
Hai -
kann mir jemand sagen, wie ich den Modalwert in R berechne?! IRgendwie finde
ich den Befehl nicht....
greetz und herzlichen Dank
Sonja
2003 Mar 19
3
r-help using random generating
To whom it may concern:
Given that my sample size is n, my mean is 100, and my sd is 10, I need to
use a random number generator (which I believe is the function
rnorm(5,100,10)), but I need to repeat it a large number of times, and then
plot the sampling distributions of the sample means, sd's, and variances of
those generated sets. I'm having a real hard time trying to figure out how
2003 Jan 12
1
likelihood and score interval estimates for glms
G'day list!
I'm thinking about programming likelihood and score intervals for
generalized linear models in R based on the paper "On the computation of
likelihood ratio and score test based confidence intervals in
generalized linear models" by Juha Alho (1992) (Statistics in Medicine,
11, 923-930).
Being lazy, I thought that I would ask if anyone else on the list has
2003 Dec 08
2
Character graphics
Does anyone else miss email-friendly character graphics such as the
following example, produced using Minitab?
Histogram of C6 N = 478 N* = 21
Each * represents 2 observation(s)
Midpoint Count
-12 16 ********
-11 53 ***************************
-10 63 ********************************
-9 83
2003 Sep 08
2
How do I coerce numeric factor columns of data frame to vector?
I have just noticed that quite a few columns of a data frame that I am
working on are numeric factors. For summary() purposes I want them to be
vectors. I tried, for example
> indx <- c(1:18,21:37,40,41)
> i <- 0
> i <- i+1
> summary(as.vector(sflows1[indx[i]]))
Length Class Mode
min.pkt.sz 3000 factor numeric
but this does not give the five-number
2002 Dec 03
2
Array multiplication
I wanted a sort of matrix product of an array and a matrix.
As there does not seem to be any array multiplication apart from outer()
I proceeded as follows:
lambda <- array(0, c(n,m,d))
# stuff omitted
# zed is an n by m matrix
#
# \lamb.star_{ik}
lamb.star <- matrix(0, nrow=n, ncol=d)
for (i in 1:n) {
for (k in 1:d) {
for (j in 1:m) {
lamb.star[i,k] = lamb.star[i,k] +
2002 Sep 27
8
Longer synonym for R?
[This message is not always serious, but it addresses a real problem.]
A problem with R's present name is that it is not very well suited to
search engines, although Google at least seems to cope as long as you have
sufficient other terms to filter out Toys R Us. Initials remain a problem.
I suppose "R" is just too culty to do away with, but perhaps we could come
up with a longer
2002 Sep 30
2
Decompose numerical factor into orthog. poly parts
Consider the following analysis of a class experiment done as a Latin Square:
> spinner <- gl(4,4,16,label=c("Murray","Angela","Shasha","Stephen"))
> order <- gl(4,1,16)
> treat <- scan()
1: 1 2 4 3
5: 4 3 1 2
9: 3 4 2 1
13: 2 1 3 4
17:
Read 16 items
> coin <-
2004 Feb 05
2
Sweave problem
Here is the file minimal.Snw:
\documentclass[a4paper]{article}
\title{R tips and tricks}
\author{Murray Jorgensen}
\usepackage{Sweave}
\begin{document}
\maketitle
\section*{Entering data from a single variable}
The following data are transformed tensile strength measurements on
polyester
fibres. They may be found on the file \texttt{TENSILE.DAT}. We
may enter this data into R using the
2003 Nov 12
1
Plotting lm() attributes
Suppose you fit a linear model
> model.1 ~ lm(v1 ~ ..., data=myframe)
and v2 is some other column of myframe typically not in the model. You
will often want to try
> plot(v2, model.1$residuals)
but this will fail if there are NAs in the response v1 as
model.1$residuals has length equal to the number of nonmissing values in
v1. I suppose
> plot(v2[!is.na(v1)],
2002 Nov 07
1
Macros versus functions
R is a function-oriented language and functions have the advantage that
they control unintended side effects of computations on the workspace.
Still, there are times when I am using R when I want to make a large
number of changes to the worksheet repeatedly and where the easiest way
seems to be to keep pasting in the same chunk of code, or to put it on
a file and use
2004 Mar 01
3
Scanning tab-separated numbers
I want to paste in the following numbers into a scan:
0.023 0.032 0.054 0.069 0.081 0.094
0.105 0.127 0.148 0.169 0.188 0.216
they are separated by tabs alone, unless my mailer has done something to
the tabs.
Now have a look at this:
> scan()
1: 0.0230.0320.0540.0690.0810.094
1: 0.1050.1270.1480.1690.1880.216
Error in scan() : "scan" expected a real, got
2003 Apr 21
4
nonlinear equation solver?
Dear R-Help,
I am trying to use R to solve a nonlinear equation many times for different values. I am looking for a mathematical nonlinear equation solution which may not have a closed solution form. For example, I have equation:
2 = (t^2)/log(t)
What is t?
I am wondering how to solve it in R.
Many thanks,
Zhu Wang
Statistical Science Department
SMU.