Displaying 20 results from an estimated 2000 matches similar to: "round() seems inconsistent when rounding 5s"
2001 Nov 16
2
Finite Mixture Analysis
Are there any S-Plus or R libraries/packages that do Finite Mixture
Analysis following the algorithms similar to those implemented in Geoffrey
MacLachlan's EMMIX program?
Thanks.
Dr. Marc R. Feldesman
email: feldesmanm at pdx.edu
email: feldesman at attglobal.net
fax: 503-725-3905
"Don't know where I'm going.
Don't like where I've been.
There may be no exit.
But
2001 Aug 12
2
rpart 3.1.0 bug?
I just updated rpart to the latest version (3.1.0). There are a number of
changes between this and previous versions, and some of the code I've been
using with earlier versions (e.g. 3.0.2) no longer work.
Here is a simple illustration of a problem I'm having with xpred.rpart.
iris.test.rpart<-rpart(iris$Species~., data=iris[,1:4],
parms=list(prior=c(0.5,0.25, 0.25)))
+ )
>
2003 Jun 26
3
Compiling R for OS X 10.2.6 (Darwin 6.6)
Our lab just picked up a G4 Powerbook (1 GHz, 1GB RAM, OS X 10.2.6). None
of us have any experience with Macs but for various reasons we need to have
one around for development.
In any case, we've installed fink, all the Apple Developer Tools and the
Dec2002updater to gcc 3.3. We're now trying to compile R 1.7.1 without too
much success. First we had to get g77, which turned out to
2001 Dec 26
1
ESS 5.1.19 w/Xemacs 21.4.6
Probably wrong group for this, but a quick question. I've just switched
from emacs to Xemacs. In reinstalling ESS 5.1.19 I keep getting the
following error when loading Xemacs:
"Error in init file: Symbol's function definition is void: w32-using-nt"
I've debugged the ess-site.el file, which is where the error originates
from. The line causing the difficulty is:
2004 Apr 02
5
Plot symbols for more than 25 groups
Is there any effective way to get distinct geometric plotting symbols and
colors for plots involving more than 25 groups?
Thanks.
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State University
email: feldesmanm at pdx.edu
email: feldesman at attglobal.net
fax: 503-725-3905
"Don't knock on my door if you don't know my
2001 Sep 13
3
OT: ps -> eps -> MS Word
I've created a bunch of postscript trees (post.rpart), which I subsequently
edit in Adobe Acrobat 4.05 (I need additional labelling that isn't easy to
add with R). After editing the labels and annotations using Acrobat, I
then export the file to Adobe's .eps format so I can insert the picture
into a Microsoft Word 2000 document. The .pdf file distilled from the .ps
file is
2004 May 30
1
summary.lm
I ran across this error the other day while using lm(). I confess that I
haven't used it for awhile and haven't been tracking the changes between
versions of R. However, the piece of code below is a tiny modification of
the example in the help file for "lm". I just separated the commands apart
for clarity. A similar piece comes from the help file for
2001 Jul 12
2
rpart puzzle
I've been using the package rpart with R 1.3.0 for Windows to produce
simple classification trees for some measurement data from paleontological
specimens. Both the rpart documentation and the output confirm that the
program produces splits on continuous data that leave "holes" in the
data. It is probably of little practical importance, but is there a reason
why the binary
2001 Aug 03
2
Math symbols in email - not completely OT
What is the generally accepted way to put certain math symbols into plain
text email?
For example, how does one convey the "is exactly equal to", "is
approximately equal to", and "delta" symbols in a standard text-based (e.g.
Courier) font?
Dr. Marc R. Feldesman
email: feldesmanm at pdx.edu
email: feldesman at attglobal.net
fax: 503-725-3905
2002 May 23
5
logistic regression or discriminant analysis ?
Hello,
Does logistic regression really provide better results than lda or qda ?
(my purpose is not classification but highlighting of discriminant
variables).
If this is true, where could I get an R script performing stepwise logistic
regression ?
Thanks
--
Daniel AMORESE
Lab. M2C "Morphodynamique Continentale et C?ti?re"
UMR CNRS 6143 Caen/Rouen
Centre de G?omorphologie
UCBN
2000 Mar 08
1
Coercing character to factor
I just downloaded version 1.0.0 and several binary libraries (VR, rpart,
norm, stataread) - WinNT version. I then converted a file from Stata 6.0
to R format by using the stataread library. The file converts perfectly
and I was able to use the VR function lda on the dataframe without
difficulty. I then tried to use the same dataframe with RPART. The model
statement:
2002 Sep 14
2
OT: Compiling EMMIX
Sorry for the off-topic post, but there is such a wealth of knowledge here
that I thought someone might have suggestions.
Geoff MacLachlan and David Peel have a program - EMMIX - available for
mixture modelling. It is only available as FORTRAN source code and is
"downloadable" from Geoff's site. The code is reputed to run on Unix
machines and is compilable according to
2001 Feb 01
3
summary() vs mean()
Forgive what may seem to be a trivial question/problem.
Below is some simple R 1.2.1(Windows) code with output.
> summary(mammals, digits=10)
Name Body.Weight Brain.Weight
Red Fox :1 Min. : 3.0 Min. : 26.0
Pig :1 1st Qu.: 35.5 1st Qu.: 138.5
Man :1 Median : 100.0 Median : 406.0
Kangaroo:1 Mean : 761.2 Mean :1000.0
Jaguar :1 3rd
1999 May 06
1
Model building ...
Hi
Are there any functions that de-convolute data into a given number of
clusters, rather like the NPMLE GLIM macros from Murray Aitkin and Brian
Francis? Basically I would like to code into R the same approach but
include the possiblility of some data being censored. In principle the
formulae are the same (just replace the likelihood function) but I haven't
managed to get my head round the
2002 Jul 03
2
"Best" Out of box Linux distro for R
At the risk of starting a holy war, I'd like opinions on the "best" current
Linux distribution to run "out of box" with current versions of R. I note
rpms for various versions of RedHat, SUSE, Mandrake, and Debian. I've had
experience with RH 7.1 & 7.2 and it hasn't been entirely pretty. I
understand that 7.3 is a bit "better", but have also
2002 Nov 11
2
Bootstrp help
Hey,
I have a set of data and want to use Bootstrap
method to estimate some pararameters.
So does anybody know if there are such
functions in R to achieve this?
Thanks for your points.
Fred
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or
2001 Sep 23
1
plot and lm (2)
Thanks for your reply Nassar.
What I really want is to overlay (like add=TRUE) the plots 1 and 2. With
plots "at the same screen" I meant overlaid and not one beside the other,
i.e., only one plot with all the points (1 to 10) in blue (or any other
color), the points 5 to 9 in red and a regression line from points 5 to 9.
Best regards,
Antonio Olinto
----- Original Message -----
2001 Dec 07
2
Help for Linear Discriminant Analysis
Dear colleague,
I'd like to compute linear discriminant analysis, using R. In the book Modern applied statistic with Splus (Venables & Ripley, p. 396), lda function is used. Could you tell me where I can find this function? At what site, can I download this library ?
Thank for your help.
Best Regards
Sovan
----------------------------------------------------------------
Prof. Sovan
2000 Jul 10
3
help page typos (PR#599)
A couple of help page typos that I came across:
1.
help(sample)
Arguments:
x: Either a (numeric, complex, character or logical) vector of
more than one elements from which to choose, or a positive
^
[element]
2.
help(delay)
Description:
`delay' creates a promise to evaluate the given expression in the
2003 Dec 20
7
error bars around a point
All
Is there an R command to produce error bars around
a plotted point. Crawley's book uses the command
error.bar() but my version of R rejects it. Must be an
S+ command(?).
Thanks
REX
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