Displaying 20 results from an estimated 500 matches similar to: "Time series reliability questions"
2023 Jan 05
1
R 'arima' discrepancies
Rob J Hyndman gives great explanation here
(https://robjhyndman.com/hyndsight/estimation/) for reasons why results
from R's arima may differ from other softwares.
@iacobus, to cite one, 'Major discrepancies between R and Stata for
ARIMA'
(https://stackoverflow.com/questions/22443395/major-discrepancies-between-r-and-stata-for-arima),
assign the, sometimes, big diferences from R
2004 May 25
1
Tramo-seats support in GRETL, but not R
On Mon, 24 May 2004 12:00:46 +0200 v.demartino2@virgilio.it wrote:
> Working - among other things- in the field of (short & long term)
electricity
> forecast,
* * *
> we have to comply with the Tramo-seats closed-source procedure
(http://www.bde.es/informes/be/docs/dt0014e.pdf)
> to deal with seasonality of electricity monthly time-series, in line
with
> the methodology
2006 Nov 17
1
Files in EViews format
Dear HelpeRs,
I wonder if anyone knows of ways to read EViews file types.
I did not find a function in the package 'foreign' and a search query
submitted to http://search.r-project.org was not successful.
Any hint is very much welcome.
Dietrich Trenkler
--
Dietrich Trenkler c/o Universitaet Osnabrueck
Rolandstr. 8; D-49069 Osnabrueck, Germany
email: Dietrich.Trenkler at
2004 May 24
2
Tramo-seats
Working - among other things- in the field of (short & long term) electricity
forecast, we are now using too many & too expensive pieces of licensed
software: SAS, SPSS, EViews. This "sedimentation" is due to the fact that
my predecessors in the past used different consultant companies to manage
each procedure.
Having attended the useR2004! Conference with the aim of assessing
2010 Nov 18
1
how do I build panel data/longitudinal data models with AR terms using the plm package or any other package
Hi All,
I am doing econometric modeling of panel data (fixed effects). We currently use Eviews to do this, but I have discovered a bug in Eviews 7 and am exploring the use of R to build panel data models / longitudinal data models. I looked at the plm package but do not see how I can incorporate AR terms in the model using the plm package. I have an Eviews model with two AR terms, AR(1) and
2011 Dec 06
1
About summary in linear models
Hello!!, for linear models fit I use Gretl, but now I'm starting to use R,
I would like to know if is there some function to obtain a extended summary
like in Gretl.
I will write a example in Gretl
Modelo 1: MCO, usando las observaciones 1968-1982 (T = 15)
Variable dependiente: Invest
Coeficient
St error
t-ratio
p-value
const
377,631
35,0955
10,7601
<0,00001
***
GNP
2005 Mar 14
1
r: eviews and r // eigen analysis
hi all
i have a question that about the eigen analysis found in R and in
eviews.
i used the same data set in the two packages and found different
answers. which is incorrect?
the data is:
aa ( a correlation matrix)
1 0.9801 0.9801 0.9801 0.9801
0.9801 1 0.9801 0.9801 0.9801
0.9801 0.9801 1 0.9801 0.9801
0.9801 0.9801 0.9801 1 0.9801
0.9801 0.9801 0.9801 0.9801 1
now
> svd(aa)
$d
[1] 4.9204
2004 Sep 23
1
R vs EViews - serial correlation
Dear all,
I met with some problems when dealing with a time series with serial correlation.
FIRST, I generate a series with correlated errors
set.seed(1)
x=1:50
y=x+arima.sim(n = 50, list(ar = c(0.47)))
SECOND, I estimate three constants (a, b and rho) in the model Y=a+b*X+u, where u=rho*u(-1)+eps
library(nlme)
gls(y~x,correlation = corAR1(0.5)) # Is it the right procedure?
2011 Dec 06
1
Duda sobre summary
Hola!! A ver si alguien puede ayudarme!!
Para ajuste de modelos lineales normalmente uso Gretl. Ahora estoy
empezando a hacerlo en R. Me gustaría saber si existe alguna función
que haga un summary extendido como el de Gretl. Os pongo un ejemplo
del summary de Gretl.
Modelo 1: MCO, usando las observaciones 1968-1982 (T = 15)
Variable dependiente: Invest
Coeficiente Desv. Típica
2012 Aug 09
2
Olympics: 200m Men Final
Hello,
Have you seen the log-linear prediction of the 100m winning time in R
mailed to the list yesterday by David Smith, subject Revolutions Blog:
July roundup?
"A log-linear regression in R predicted the gold-winning Olympic 100m
sprint time to be 9.68 seconds (it was actually 9.63 seconds):
http://bit.ly/QfChUh"
The original by Markus Gesmann can be found at
2008 Mar 20
1
Interpretation of Variance decomposition in VAR model
Hi all,
This question is not really R related, rather on Statistics subject itself. Even I did not do those using R. however still I want to post it here, because my hope is I could get help from great statisticians who are the very active member of this group.
My problem is to interpret Variance decomposition of VAR model in layman's language.
Using EViews I got following :
Variance
2004 Nov 17
2
R/S-related projects on Sourceforge? Trove Categorization - GDAL
GDAL Package for R
http://sourceforge.net/projects/rgdal
The R GDAL package is an interface for accessing Frank Warmerdam's
Geographic Data Abstraction Library
from within R.
GDAL is capable of reading and writing a wide range of geographic data
formats including ESRI grid format and geotiff.
On Wed, 2004-11-17 at 09:09, Witold Eryk Wolski wrote:
> <SNIP>
> SourceForge.net
2005 Dec 25
1
Different ARCH results in R and Eviews using garch from tseries
Dear Sir,
First of all Happy Holidays!,...
I am writing to you because I am a bit confused about ARCH estimation.
Is there a way to find what garch() exactly does, without the need of
reading the source code (because I cannot understand it)?
In Eviews (the results at the end) I am getting different results than
in R (for those that have the program I do: Quick -> Estimage Equation
->
2008 Aug 04
1
R init file and source()
In the context of calling R from another program (namely gretl,
http://gretl.sourceforge.net ) I'm trying to understand the
interactions of the R init file (corresponding to the environment
variable RPROFILE) and the source() function.
I'll illustrate my problem with the following simplified contrast
implemented in the bash shell (with R 2.7.1).
1. Works fine:
allin at myrtle:~/Rfoo$
2003 Jun 06
2
R help: Correlograms
Hello,
I have time series and need to draw simple and partial correlograms with associated Q-statistics (the same as in EViews). Can I do it in R? Thanks
---------------------------------
[[alternate HTML version deleted]]
2006 Nov 23
1
ARMAX Models in R
Hi,
I want to model different timeseries with ARMAX models in R because I think
that ARMAX models will map best to these data.
Besides I don't want to use the order of the AR or MA part but the lag e.g.
AR Part =ar1, ar2, ar7; MA Part =ma1, ma3 and I want to use exogenous
variables as well.
I coudn't find any solutions in the R help and therefore I want to ask all
of you.
Does anyone
2017 Nov 27
0
Scatterplot of many variables against a single variable
Dear Berger and Jim
Can you see my eviews example in the annex? (scattersample.jpg)
Sincerely
Engin
2017-11-27 13:27 GMT+03:00 Eric Berger <ericjberger at gmail.com>:
> LOL. Great reply Jim.
> (N.B. Jim's conclusion is "debatable" by a judicious choice of seed. e.g.
> set.seed(79) suggests that making the request more readable will actually
> lower the number of
2012 May 25
1
Problem with Autocorrelation and GLS Regression
Hi,
I have a problem with a regression I try to run. I did an estimation of the
market model with daily data. You can see to output below:
/> summary(regression_resn)
Time series regression with "ts" data:
Start = -150, End = -26
Call:
dynlm(formula = ror_resn ~ ror_spi_resn)
Residuals:
Min 1Q Median 3Q Max
-0.0255690 -0.0030378 0.0002787
2009 Feb 16
4
assuming AR(1) residuals in OLS
Hi to all,
In other statistical software, such as Eviews, it is possible to
regress a model with the Least Squares method, assuming that the
residuals follow an AR(q) process.
For example the resulting regression is something like
y = 1.2154 + 0.2215 x + 0.251 AR(1)
How is it possible to do the same in R?
Thank you very much in advance,
Constantine Tsardounis
http://www.costis.name
2010 Jun 19
3
R vs SAS and Revolution R
Hello
How do you compare R to SAS in terms of speed and management of large
datasets?
What about Revolution R?
I've seen on their site, they claim that Revolution R is much faster than R
and it's multithread...
Can you really notice the difference?. What dissadvantage does it have?
I think it's based on R 2.10. but R already issued the version 2.12
Regards
What alternative