Displaying 20 results from an estimated 300 matches similar to: "Standar errors arma models"
2012 Aug 01
3
help with a regression problem
Hello,
I have a big data frame where consecutive time dates and corresponding observed values for each subject (ID) are on a line. I want to compute the linear slope for each subject. I would like to use apply but I do
not know how to express the corresponding function. An example using a loop follows
#
# create dummy data set There are missing values
a <- c(1,2,3,4, 1,1,1,1, 2,2,3,3,
2007 Jun 03
2
Problems compiling RMySQL
Hello, I am trying to compile/Install RMySQL_0.6-0 in
R-2.4.1/2.5.0 under Windows XP MCE, I am using MySQL
5.0.41. I have followed the instructions in the file
INSTALL.win, but I get some errors...
C:\Program Files\R\R-2.4.1>Rcmd build --binary RMySQL
--docs=normal
* checking for file 'RMySQL/DESCRIPTION' ... OK
* preparing 'RMySQL':
* checking DESCRIPTION meta-information
2012 Nov 05
1
Post hoc tests in gam (mgcv)
Hi.
I'm analysing some fish biological traits with a gam in mgcv. After several
tries, I got this model
log(tle) = sexcolor + s(doy, bs = "cc", by = sexcolor) +log(tl)
sexcolor is a factor with 4 levels
doy is "day of year", which is modeled as a smoother
tl is "total length of the fish"
The summary of this models is (only parametric coefficientes):
Parametric
2012 Feb 23
2
help with winbugs glm
Hi,
I am running a model with count data and one categorical predictor (simple
model for me to understand it fully), I did in R a glm like this:
glm(Recruitment~Depth, family=poisson). I get the coefficientes and
confidence intervals and all is ok. But then I want to do the same model
with Bayesian stats, here is my code:
model
{ for (i in 1:232)
{
Recruitment[i]~dpois(lambda[i])
2007 Aug 27
0
Robust Standar Errors in Zero-Truncated Poisson
Hi.
I would like to know if is it possible to estimate zero-truncated count
models with robust standard errors in R. In Stata that is possible. I
already made some searches and attempts but not obtained it. In R I made the
estimation of the truncated poisson by the vglm command of VGAM package .
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2008 Apr 07
1
plot with standar deviation (use abline and mad())
Hi list
Maybe someone can help with the following problem (thanks in advance):
I need to analisy a long list of data time \fluoscence
I want to make one plot with standard deviation and the average data... Could you suggest me how to make that..
The data have this distribution:
How can read and extrapolate this data?
pippo.csv
ps <- read.table(pippo.csv)
time fluorescence
0; 0
4.013; 62.96
2005 Dec 29
3
NoMethodError problem
Hello.
Id like you to help me with something here, i m trying to create a log
manager just for fun but I cant make it work since the beginning.
I created my project, configured the db, initialized my model Log and
then my controller Log, then im just trying to use scaffold :log for the
controller but I cant make it work, the error says:
undefined method `errors'' for
2009 Feb 12
1
Using nls or nls.lm with a simulation output
We would like to fit parameters using a simulation with stochastic
processes as theoretical values. We generate a simple exemple with nls.lm
to see the logic and the problem:
First without stochasticity (it is a dummy example, the fited value is
simple the mean of a set of 10 numbers):
#Ten numbers
x <- 1:10
#Generate 10 Gaussian random number with mean=3 sd=1
simy <- rnorm(length(x),
2011 Feb 05
1
dovecot not delivering emails in the right folder
Hello everyone,
I'm having trouble getting postfix + dovecot to work correctly.
It seems like Postfix is receiving and delivering the emails correctly but
dovecot is placing/looking for them in the wrong folder therefore the
clients aren't receiving any new emails.
I switched from courier and followed a tutorial found here:
2012 Oct 10
2
se's and CI's for fitted lines in multivariate regression analysis
I?m entirely stumped on this particular issue and really hoping someone has
some advice for me.
I am running a covariant model in lm I would like to give the standard
errors or the confidence intervals for the fitted lines. I?ve been using the
dataset OrangeSprays where I want lines for each level of treatment over the
covariant ?colpos?. I?ve been able to calculate intercepts and slopes for
2007 Sep 14
6
replace NA value with 0
Hi,
how can I replace NA value with 0:
1991 217 119 103 109 137 202 283 240 146 NA
1992 270 174 149 144 166 239 278 237 275 NA
1993 146 111 104 89 98 131 153 148 175 NA
1994 177 123 146 124 121 200 266 191 240 106
1995 145 98 95 89 95 130 183 161 164 129
1996 145 98 89 90 93 138 158 131 161 161
1991 217 119 103 109 137 202 283 240 146 0
1992 270 174 149 144 166 239 278 237
2011 Aug 10
1
studentized and standarized residuals
Hi,
I must be doing something silly here, because I can't get the studentised
and standardised residuals from r output of a linear model to agree with
what I think they should be from equation form.
Thanks in advance,
Jennifer
x = seq(1,10)
y = x + rnorm(10)
mod = lm(y~x)
rstandard(mod)
residuals(mod)/(summary(mod)$sigma)
rstudent(mod)
2013 May 29
0
Lista dos aprovados em concurso Lagoa da Canoa
Lista dos aprovados em concurso Lagoa da Canoa:
V?rzea Grande: ANA MARA DE SOUSA PEREIRA, LUANA FERNANDA FERNANDES ANDRADE, FRANCISCO ROGER GARCIA DE ALMEIDA, POLLYANNA DE O, JO?O CARLOS MOREIRA DE CARVALHO, DANIELLA FERNANDES DA SILVA, MARIA JOS? DA SILVA FERREIRA, J?SSICA VENTURA FREIRE. SOLANGE PAULINO CORREIA, BRUNA KETHEY DA SILVA PEIXOTO, LUIS HENRIQUE FREITAS GOMES, HELIO SOARES DE ARAUJO,
2011 Sep 13
1
stupid lm() question
I feel bad even asking, but:
Rgames> data(OrchardSprays)
Rgames> model<-lm(decrease~.,data=OrchardSprays)
Rgames> model
Call:
lm(formula = decrease ~ ., data = OrchardSprays)
Coefficients:
(Intercept) rowpos colpos treatmentB treatmentC
22.705 -2.784 -1.234 3.000 20.625
treatmentD treatmentE treatmentF treatmentG treatmentH
2007 Jul 04
1
retrieving stats from bwplot
Hi all,
I want to retrieve the stats from a 'bwplot' with one factor. I have read the help for 'panel'
function and I'm aware of the option 'stats' which defaults to 'boxplot.stats' but I didn't
understand it well and therefore I am unable to get what I need.
Thanks in advance.
Héctor Villalobos
Windows XP, R 2.5.0
> bwplot(decrease ~ colpos |
2005 Aug 12
1
Problem with lme4
Hi,
I cannot seem to get lme4 to work. I have installed the lme4 and Matrix
package with apt-get. and both can be found in /usr/lib/R/site-library.
When I tried an example for lmer, R could not find the function lmer(),
> library(lme4)
Attaching package: 'lme4'
The following object(s) are masked from package:nlme :
getCovariateFormula getResponseFormula
2009 Feb 15
0
Package for Markov (Regime) Switching (ARMA) Models
Hello R-Users
Is there a package in R, that handles Markov (Regime) Switching (ARMA) Models for time series modelling and prediction?
Thank you very much.
Regards,
Andreas.
2002 Aug 05
1
Modified ARMA function
R-guRus ,
ARMA function in tseries, seems to be calculating the AR coeff 's as
coef <- lm(xx[,1]~xx[,lag$ar+1])$coef [*snipped* from around line
77,]
I'd like to modify this model with another term somewhat in these lines
lm(xx[,1] ~xx[,lag$ar+1]+mvgsignal)$coef
where mvgsignal is a moving average signal based on some indicators, the
question
is could i simply hack into
2012 Mar 01
2
Robust ARMA Fitting in R?
Hello, BODY { font-family:Arial, Helvetica,
sans-serif;font-size:12px; }
Does any one know if there are any functions/packages available in R
for robust fitting of ARMA time series models (e.g., similar to the
function arima.rob() in S-PLUS)?
Many thanks and kind regards,
Isabella
Isabella R. Ghement, Ph.D.
Ghement Statistical Consulting Company
301-7031 Blundell Road,
2009 Apr 06
0
ARMA-GARCH package in R?
Hello,
Does anyone know about an R-package on multivariate ARMA-GARCH models? Or in
Matlab?
I would be very grateful if someone could help!
Thanks a lot!
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