Displaying 16 results from an estimated 16 matches similar to: "Extracting columns from a class"
2010 Aug 15
2
band pass filter
Hello list,
Is there any way to bandpass filter in R
thanks
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
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2011 Apr 04
1
svd
Dear list,
I searched the libraries but could not find means to compute the
svd of a coupled field. Is it possible in R
Thanks
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
[[alternative HTML version deleted]]
2010 Jul 05
2
timeseries
Dear useRs,
I am trying to construct a time series using as.ts function, surprisingly
when I plot
the data the x axis do not show the time in years, however if I use
ts(data), time in years are shown in the
x axis. Why such difference in the results of both the commands
Thanks
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
2010 Aug 02
1
removing spatial auto correlation
Hi list,
I am trying to fit arima model for a grid of 360x161x338 points,
where 360x161 is the spatial dimension and 338 is the number of time steps I
have, which is seasonal. For this purpose I used the auto.arima function in
forecast package. After fitting residuals at each grid in space, the auto
correlations are still significant ( but < 0.2). This make me think that the
data
2010 May 31
1
missing values in autocorelation
Hi all,
I am trying to find the autocorrelation of some time series. I
have say 100 files, some files have only missing values(-99.99, say). I dont
want to exclude these files as they represent some points in a grid. But
when the acf command is issued i get an error.
Error in plot.window(...) : need finite 'ylim' values
In addition: Warning messages:
1: In min(x) : no
2010 Jun 07
1
prewhiten
HI all.,
I have some univariate time series that need to be prewhitened. HOw this can
be performed in R.
I am thinking of to fit an ARIMA model and substract this from the original
series. Is this the correct way
THanks in advance
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
[[alternative HTML version deleted]]
2010 Jul 06
1
acf
Hi list,
I have the following code to compute the acf of a time series
acfresid <- acf(residfit), where residfit is the series
when I type acfresid at the prompt the follwoing is displayed
Autocorrelations of series ?residfit?, by lag
0.0000 0.0833 0.1667 0.2500 0.3333 0.4167 0.5000 0.5833 0.6667 0.7500 0.8333
1.000 -0.015 0.010 0.099 0.048 -0.014 -0.039 -0.019 0.040 0.018
2011 Apr 01
1
principal components
HI all,
I am trying to compute the EOF of a matrix using prcomp but unable to get
the expansion co-efficients.
is it possible using prcomp or are there any other methods
thanks
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
[[alternative HTML version deleted]]
2010 Jul 22
1
tsdiag
HI list,
I want to know whether tsdiag uses k-(p+q) as the lag in ljung box
test. How is it possible to save those values
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
[[alternative HTML version deleted]]
2010 May 20
2
writing autocorrelation and partial auto correlation functions to a file
Dear All,
I am very new to T. I need to fit a ARIMA model to my time
series. So I found the auto correlation functions and partial auto
correlation function in R. Now I want to save these valuse along with the
significance levels to a file. How to do that?. I tried some function in R
like write.table but returns an error "cannot coerce class "acf" into a
2010 Jul 23
0
auto.arima
HI list,
I am using auto.arima from forecast package, I wonder whether its
possible to save model orders to a seperate file
Thanks
nuncio
--
Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
[[alternative HTML version deleted]]
2011 Jun 13
1
documentation in R
How we can call auto.arima in R.
Is there any cran package we need to install for this function?
--
Siddharth Arun,
4th Year Undergraduate student
Industrial Engineering and Management,
IIT Kharagpur
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2010 Jul 23
1
sink function
I have the following code to write the output from auto.arima function. The
issue is not in finding the model but to divert its out put
fit to a file order_fit.txt. code runs but nothing is written to
order_fit.txt
where am I going wrong
library(forecast)
for (i in 1:2) {
filen = paste("file",i,".txt",sep="")
data <- read.table(filen)
dat1 <- data[,1]
xt <-
2010 Jul 13
2
Regarding R -installation
Dear R-help Team Members,
I am venkatesh , Student of university of Hyderabad, while Installing R from
the specified servers, I encountered the following problem. please help me
regarding. i need this to do my project .
Thanking you.
*Problem* :
Cannot access installation media
http://download.opensuse.org/repositories/devel:languages:R:patched/openSUSE_11.2
(Medium 1).
Check whether the
2010 Oct 15
0
nomianl response model
Is there a way to estimate a nominal response model?
To be more specific let's say I want to calibrate:
\pi_{v}(\theta_j)=\frac{e^{\xi_{v}+\lambda_{v}\theta_j}}{\sum_{h=1}^m
e^{\xi_{h}+\lambda_{h}\theta_j}}
Where $\theta_j$ is a the dependent variable and I need to estimate
$\xi_{h}$ and $\lambda_{h}$ for $h \in {1...,m}$.
Thank you,
Mauricio Romero
Quantil S.A.S.
Cel: 3112231150
2010 Nov 24
0
4. Rexcel (Luis Felipe Parra)-how to run a code from excel
Hi Louis,
It's simple to run a r script from the excel spreadsheet.
Just write your code, source("C:\\Quantil
Aplicativos\\Genercauca\\BackwardSelectionNC.r"), into a cell of a
workingsheet. Then right-click the cell and select "run code" in the pop-up
menu.
Hope this will help you.
Best,
Bernard
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