Displaying 20 results from an estimated 206 matches for "rsitesearched".

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rsitesearch

2006 Jul 12

2

AICc vs AIC for model selection

Hi,
I am using 'best.arima' function from forecast package to obtain point forecast for a time series data set. The documentation says it utilizes AIC value to select best ARIMA model. But in my case the sample size very small - 26 observations (demand data). Is it the right to use AIC value for model selection in this case. Should I use AICc instead of AIC. If so how can I modify

2011 Sep 30

1

Implementing Silverman's Negative Reflection

Hi!
I'm trying to implement in R in an easy way the negative reflection method
described in Silverman (1986) on p.31, ie I have a non-negative dataset and
would like to estimate the density by applying a reflection method where the
reflected points have weight -1.
I thought there should be a way to evaluate the wanted kernel at the
required points, in other words to calculate formula (2.16):

2005 Apr 12

1

adding R site search to Rgui

From: Gabor Grothendieck
> On Apr 11, 2005 11:28 AM, Martin Maechler <maechler at stat.math.ethz.ch>
wrote:
> >
> > If you use R 2.1.0 beta (which you should consider seriously as
> > a good netizen ;-), this is as simple as
> >
> > > RSiteSearch("String manipulation---mixed case")
> > A search query has been submitted to

2012 Mar 22

2

trouble for parsing HTML files

Hi all,
Using the XML package, I'm not able to parse some html webpages. Here
is my code and the error message:
library("XML")
url <- "http://www.huffingtonpost.com/social/GraniteSkyline?action=fans"
doc <- htmlParse(url)
Error: Namespace prefix ??? of attribute (null) is not defined
I've searched a lot on the Internet, but it's really

2008 May 01

1

Optimal knot locations for splines

Suppose I have two variables, x and y. For a fixed number of knots, I want
to create a spline transformation of x such that a loss function is
minimized. Presumably, this loss function would be least squares, i.e. sum
(f(x)-y)^2. The spline transformations would be linear, quadratic or
cubic. I know I can solve this problem using some optimization function in
R, but I was wondering if anyone

2006 Aug 09

1

NLS and IV

Hello All,
I'm looking to test a variable in a logit model (glm(...,
binomial(link="logit"))) for exogeneity (endogeneity). At this point I am
planning to try implementing Jeffery Grogger's "A Simple Test for Exogeneity in
Probit, Logit, and Poisson Regression Models", Economic Letters, 1990. To do
this, I need to be able to do an instrumental variables NLS

2006 Oct 16

1

The old question: R vs MATLAB vs Mathematica vs ...

Hi,
This question seems to be old, however I am asking it from a different point
of view.
R introduces itself as a 'statistical' language and environment. There are
many discussions about comparing R to MATLAB or mathematica (or other
similar software). It seems to me that these other software have a broader
range of applications. For example, in Mathematica one can solve a partial

2009 Apr 03

1

Curve fitting,FDA for biological data

Dear all,
Another newbie just got attracted to this mailing list.
I am a biologist currently working my way through R, had sort play around with python earlier this year.
I have some data exhibiting periodicity ** my data consists of peaks and valleys, with peaks arising due to the presence of a repetitive structural unit,** with x being a reference grid (position along a chromosome) and y

2009 May 20

10

How to google for R stuff?

Hi! I'm new to R programming, though I've been programming in other
languages for years.
One thing I find most frustrating about R is how difficult it is to use
Google (or any other search tool) to look for answers to my R-related
questions. With languages with even slightly more distinctive names like
Perl, Java, Python, Matlab, OCaml, etc., usually including the name of the
language

2011 Dec 28

2

Census ARIMA x-12 seasonal adjustment in R?

Hello,
I am new to usin R - which is a great tool - and would like to know if R
has a seasonal adjustment program for time series and/if it incorporates
the Census Bureau's ARIMA x-12 seasonal adjustment program in any way?
Thanks so much!
Tony
[[alternative HTML version deleted]]

2018 Jan 19

0

how to search r-help?

Also https://www.r-project.org/posting-guide.html indicates that
RSiteSearch() within R searches R-help but in my install (3.4.3)
RSiteSearch() only searches? "help pages, vignettes or taskviews"
On 19/01/18 10:47, Mark Dwyer wrote:
>
> I am new to this listand am unable to get the search tools listed on
>

2009 Mar 31

2

How to generate natural cubic spline in R?

Suppose I have two var x and y,now I want to fits a natural cubic
spline in x to y,at the same time create new var containing the
smoothed values of y. How can I get it?

2006 Nov 07

1

multivariate splines

Hi,
I am looking for an R package that would calculate multivarite (mostly
2d and 3d, tensor) cubic interpolating splines, so that I could
evaluate these splines (and their derivatives) at many points (unkown
at the time of calculating the spline polynomials) repeatedly.
To make things concrete, I have an array V with
dim(V) = k
and gridpoint vectors grid=list(...), length(grid[[i]])==k[i],

2006 Sep 18

1

Simulation of a Dirichlet Process.

I'm just getting started with R, having a lot of original work on
modeling and exploring the simulation by MCMC. I want to simulate the
prior and the posterior distribution of Dirichlet Process by MCMC.
Is there anyone in NYC that might be a good
tutor for me?
--
Dr. P. NGOM,
Facult? des Sciences et Techniques
D?partement de Math?matiques et Informatique
Universit? Cheikh Anta Diop Dakar -

2005 Aug 24

1

Panel regression in R

I am currently trying to replicate the results I got
from RATS for a panel regression. The codes in RATS
looks like this:
* Final equation for Office Cap Rate Spread
* Regression, Panel Data
preg(effects=time, method=random) CapRate
# CapRate{1} RentCycle{1} VacancyChangeYTY
InflationYTY RealGDPyty
Just wonder what R package also allow me to have the
options like (effects=time, method=random).

2006 Aug 25

5

Quickie : unload library

Dear list,
I know it must be obvious and I did my homework. (In fact I've
RSiteSearched with keyword "remove AND library" but got timed
out.(why?)....)
How do I unload a library? I don't mean getting ride of it permanently
but just to unload it for the time being.
A related problem : I have some libraries loaded at startup in .First()
which I have in .Rprofile. Now, I...

2009 Dec 13

1

debug an error that incapacitates R?

Dear all
How should I attempt debugging this error?
> sosInit()
Error: invalid connection
When this happens R refuses to run anything:
> 2+2
Error: invalid connection
> sessionInfo ()
Error in stdout() : invalid connection
Debugging it seems impossible.
> options(error=recover)
> sosInit()
Error: invalid connection
Error during wrapup: invalid connection
The error also

2010 Jun 22

2

Verify the linear regression model used in R ( fundamental theory)

Hi, folks,
As I understand, Least-squares Estimate (second-moment assumption) and the
Method of Maximum Likelihood (full distribtuion assumption) are used for
linear regression.
I do >?lm, but the help file does not tell me the model employed in R. But
in the book 'Introductory Statistics with R', it indicates R estimate the
parameters using the method of Least-squares. However it

2011 Nov 09

4

raking weighting

Hi everyone,
Does anyone know if there is a package to compute raking weights using
R? What I need is to create a variable with weights base in some
demographic variables (e.g. sexo, age group, area) using the raking
procedure.
Thank you in advance!
--
Sebasti?n Daza

2008 Jan 10

1

load tcltk

Hi All!
Can someone help me with the following problem?
Lade n?tiges Paket: tcltk
Loading Tcl/Tk interface ... Error in dyn.load(file, ...) :
kann shared library '/Library/Frameworks/R.framework/Versions/2.6/
Resources/library/tcltk/libs/ppc/tcltk.so' nicht laden: