On Sat, 6 Jan 2007, [EMAIL PROTECTED] wrote:
I apologize for this post. I am new to R (two days) and I have tried and
tried to calculated confidence intervals for medians. Can someone help
me?
Later, you say you want a confidence interval for a difference in medians,
not the same thing.
Dear Lister,
I am facing a strange problem fitting a GLM of the negative binomial
family. Actually, I tried to estimate theta (the scale parameter)
through glm.nb from MASS and could get convergence only relaxing the
convergence tolerance to 1e-3. With warning messages:
I agree with what you are saying. That is the reason I have What is the
problem you are trying to solve on my signature.
The other way of saying that is Tell me what you want to do, not how you
want to do it.
On 1/5/07, Thomas Lumley [EMAIL PROTECTED] wrote:
On Fri, 5 Jan 2007, Ramon
On Sat, 2007-01-06 at 01:21 -0500, Zhenqiang Lu wrote:
Hello R-users,
I am using gls function in R to fit a model with certain correlation
structure.
The medol as:
fit.a-gls(y~1,data=test.data,correlation=corAR1(form=~1|aa),method=ML)
mu-summary(fit.a)$coefficient
With the toy data I
Dear List,
I'm building an R syntax highlighting file for GeSHi [*] for a website I
am currently putting together. The syntax file needs a list of keywords
to highlight. How can I generate a list of all the functions in a base R
installation?
Ideally the list would be formatted like this:
On 1/5/07, jim holtman [EMAIL PROTECTED] wrote:
The other reason for considering which of the different approaches to use
would be performance:
f.1 - function(x) x+1
f.2 - function(x) x+2
system.time({
+ for (i in 1:10){
+ eval(parse(text=paste('f.', i%%2+1,
Hello,
I am analyzing a data set that has possible covariates. It is also
multivariate. Are there any R function which can do analysis of covariance?
Thanks.
John Cardinale
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch
Could you tell us what you mean by
- 'function' (if() and + are functions in R, so do you want those?)
- 'a base R installation'? What is 'base R' (standard + recommended
packages?) And on what platform: the list is platform-specific?
Here is a reasonable shot:
findfuns - function(x) {
Here are a few more timing alternatives from slowest to
fastest. Of the ones that dynamically construct the name
of the frunction (all except last example), get seems to be
the fastest although its still 6x slower than the if statement.
f.1 - function(x) x+1
f.2 - function(x) x+2
n - 10^4; i
Dear Greg,
On 1/5/07, Greg Snow [EMAIL PROTECTED] wrote:
Ramon,
I prefer to use the list method for this type of thing, here are a couple of
reasons why (maybe you are more organized than me and would never do some of
the stupid things that I have, so these don't apply to you, but you can
On Sat, 2007-01-06 at 13:48 +, Prof Brian Ripley wrote:
Could you tell us what you mean by
Thank you for your reply, Prof. Ripley.
- 'function' (if() and + are functions in R, so do you want those?)
I was thinking about functions that are used like this: foo()
So I don't need things
On 1/6/07, Thomas Lumley [EMAIL PROTECTED] wrote:
On Fri, 5 Jan 2007, Ramon Diaz-Uriarte wrote:
I see, this is direct way of dealing with the problem. However, you first
need
to build the f list, and you might not know about that ahead of time. For
instance, if I build a function so
I guess the problems with eval(parse(...)) are:
- speed
- verbosity
- security
- length of string to be parsed
get is faster, less verbose and safer than eval(parse(...)) in this case.
The length of string problem seems not applicable here but I have enountered
one situation where it was.
On Sat, 6 Jan 2007, Ramon Diaz-Uriarte wrote:
Dear Greg,
On 1/5/07, Greg Snow [EMAIL PROTECTED] wrote:
Ramon,
I prefer to use the list method for this type of thing, here are a couple of
reasons why (maybe you are more organized than me and would never do some of
the stupid things that
On 1/6/2007 9:25 AM, Gavin Simpson wrote:
On Sat, 2007-01-06 at 13:48 +, Prof Brian Ripley wrote:
Could you tell us what you mean by
Thank you for your reply, Prof. Ripley.
- 'function' (if() and + are functions in R, so do you want those?)
I was thinking about functions that are
The arguments to the functions can differ too even if they
exist on multiple platforms. system() on Windows has the
input= argument but not on UNIX.
On 1/6/07, Duncan Murdoch [EMAIL PROTECTED] wrote:
On 1/6/2007 9:25 AM, Gavin Simpson wrote:
On Sat, 2007-01-06 at 13:48 +, Prof Brian
On Sat, 2007-01-06 at 10:43 -0500, Duncan Murdoch wrote:
On 1/6/2007 9:25 AM, Gavin Simpson wrote:
On Sat, 2007-01-06 at 13:48 +, Prof Brian Ripley wrote:
Could you tell us what you mean by
Thank you for your reply, Prof. Ripley.
- 'function' (if() and + are functions in R, so
On Sat, 2007-01-06 at 10:58 -0500, Gabor Grothendieck wrote:
The arguments to the functions can differ too even if they
exist on multiple platforms. system() on Windows has the
input= argument but not on UNIX.
That's a good point Gabor, and one I hadn't considered as yet. As I'm
only just
On Jan 6, 2007, at 8:34 AM, John Cardinale wrote:
Are there any R function which can do analysis of covariance?
?lm
RSiteSearch('ancova')
_
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400Charlottesville, VA
On 1/6/07, Brian Ripley [EMAIL PROTECTED] wrote:
On Sat, 6 Jan 2007, Ramon Diaz-Uriarte wrote:
(...)
cvFunct - function(whatever, genefiltertype, whateverelse) {
internalGeneSelect - eval(parse(text = paste(geneSelect,
genefiltertype, sep
On 1/6/07, Michael Kubovy [EMAIL PROTECTED] wrote:
On Jan 6, 2007, at 8:34 AM, John Cardinale wrote:
Are there any R function which can do analysis of covariance?
?lm
RSiteSearch('ancova')
Given the question, you'll probably need to find how to do an ancova
with lm. Several documents in
Hi!
I had some memory problem with R - hope somebody could tell me a solution.
I work with very large datasets, but R cannot allocate enough memoty to
handle these datasets.
I want work a matrix with row= 100 000 000 and column=10
A know this is 1 milliard cases, but i thought R could handle
Please look at the help file
?ancova
in the HH package.
Please get HH_1.17 which was up on CRAN yesterday. The source
file has propagated to the mirrors. As of a few minutes ago,
the Windows binary is on cran.at.r-project.org but not yet at the mirrors.
Be sure to have history recording on in
R-Experts:
I am using the vglm function of the VGAM library to perform proportional
odds ordinal logistic regression. The issue that I would like help with
concerns the format in which the response variable must be provided for
this function to work correctly. Consider the following example:
Hi,
I am interested in a modification to LARS that allows for positive-only
constraints in the variables (with details about how to implement this as
described in section 3.4 of the Efron et al (2003) LARS paper).
Before I dive into the lars package code myself, I was wondering if anyone
knew of
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