Displaying 20 results from an estimated 1100 matches similar to: "band pass filter"
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 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 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 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 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
2011 Mar 17
1
Extracting columns from a class
Hi list,
I am not a frequent user of R. Recently I used R in principal
component analysis and got the result as a class, which has information like
standard deviation and principal components from 1 to 10. How is it
possible to extract the column corresponding to first principal component
and write it to a file
the out from prcomp command is something like this
Standard
deviations:
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
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 <-
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
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]]
2013 Mar 14
3
Working with string
Hello again,
Let say I have following string:
Vec <- c("sada", "asdsa", "sa")
Now I want to make each element of this vector with equal length.
Basically I want following vector:
c("sada ", "asdsa", "sa ")
Therefore we can get:
> nchar(c("sada ", "asdsa", "sa "))
[1] 5 5 5
Is there any
2015 Mar 04
2
adaptive bandwidth
Thanks Dragos,
I assume I will be setting those parameters during initialization of
encoder right?
Question is, if connection gets too lossy, how will opus adapt to it? Can
it automatically shift bitrate down to minimize impact?
Mark from IRC suggests that the app has to be aware of the losses and
change it on the fly.
Has anybody on the list tried this?
Kelvin Chua
On Wed, Mar 4, 2015 at 5:53
2015 Feb 24
2
Questions regarding OPUS_APPLICATION_AUDIO vs OPUS_BANDWIDTH_NARROWBAND
I have an audio device whose 'driver' gives me Opus encoded frames using
OPUS_APPLICATION_AUDIO and max bandwidth set to OPUS_BANDWIDTH_NARROWBAND.
How does Opus encoder decide the center point of the 4K bandpass filter?
Is it done frame by frame?
--
Tony
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2001 Feb 13
1
bandpass filters in R
Hi,
does anybody have any ideas regarding the easiest and most efficient way
of implementing a bandpass filter in R ?
any help would be truly appreciated.
cheers,
Pat Johnston
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Send "info", "help", or
2005 Mar 23
3
Fc3 xm boots always maintenance mode
I really wants to know.
When I start "xm create fc3 -c" but always maintenance mode.
Is someone kind enough to point whats wrong with me?
Configfiles are like this.
kernel ="/boot/vmlinuz-2.6.11-1.1177_FC4xenU"
memory =128
name = "fc3"
nics = 1
disk = [''file:/root/fedora.img,hda2,w'']
ip="210.166.211.245"
2003 Mar 05
1
Questions about window sizes
Hello,
I have a few questions about the block size in ogg vorbis
1. The allowed blocksizes are powers of two between 64 and 8192 Samples.
As I understood , there are fixed sizes for long and short blocks .
The encoder can pick any allowed value for long blocks and onother value, that must
be smaller or equal to the first one, for short blocks.
On which base does the encoder choose the size for
2011 Jul 07
4
Return invisible list
Hi, I'm new to R. I'm trying to do some extreme value theory analysis,
looking at the Mean Excess Plot of a series. These are the commands I type
to get the plot:
x=read.table("data.txt",header=T)
goa=(x[,3])
meplot(goa)
I can see the plot, but I would like to see the values of the x and y axis.
According to this page