Displaying 20 results from an estimated 700 matches similar to: "Getting a periodogram for discrete data"
2004 Sep 27
1
Enright/Chi-square periodogram / periodicity
I am trying to compute the periodicity of a time series.
I would like to know which function in R does it.
Also, how do I plot a Enright / Chi-square periodogram using R ?
( Enright, J.T., 1965, Journal of Theoret. Biol. 8,426-468)
Greatly appreciate your help.
Thanks in advance,
Sukhaswami Malladi
***************************************************************************
The contents
2007 Dec 12
2
discrepancy between periodogram implementations ? per and spec.pgram
hello,
I have been using the per function in package longmemo to obtain a
simple raw periodogram.
I am considering to switch to the function spec.pgram since I want to be
able to do tapering.
To compare both I used spec.pgram with the options as suggested in the
documentation of per {longmemo} to make them correspond.
Now I have found on a variety of examples that there is a shift between
2007 May 25
2
R-About PLSR
hi R help group,
I have installed PLS package in R and use it for princomp & prcomp
commands for calculating PCA using its example file(USArrests example).
But How I can use PLS for Partial least square, R square, mvrCv one more
think how i can import external file in R. When I use plsr, R2, RMSEP it
show error could not find function plsr, RMSEP etc.
How I can calculate PLS, R2, RMSEP, PCR,
2007 Jul 09
1
When is the periodogram is consistent with white noise?
Hello everyone,
This is my first time posting to the list, thanks in advance.
I am calculating the smoothed periodogram for the residuals of an AR model
that I fit to EEG data. The autocorrelation plot of the residuals shows the
series is now approximately white (i.e. ACF = 1 at lag 0, and close to 0 for
all other lags). I would like to show that the spectrum of the series is
also
2017 Sep 05
2
Where to find the list of passes run by clang/opt with -O3
On Tue, Sep 5, 2017 at 12:51 PM, Davide Italiano <davide at freebsd.org> wrote:
>
>
>
> On Tue, Sep 5, 2017 at 8:16 AM, Nitish Srivastava via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>>
>> Hi,
>>
>> I am trying to locate the passes run by clang/opt when it is passed the option -O3. Can someone point me where to look at? Eventually, I want to
2017 Sep 22
1
Build clang front end only for few languages ( say C and C++ )
Hi,
I am trying to build clang, however the build size is quite large. As
clang supports non-C family languages as well ( e.g. Java, Fortran ), is
there a way to turn that off during the build. I just want to have support
for C and C++ and don't care about other languages.
Is there a CMake option that needs to be set to do that??
Thanks a lot!
Best Regards,
Nitish
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2007 Jul 06
1
about R, RMSEP, R2, PCR
Hi,
I want to calculate PLS package in R. Now I want to calculate R, MSEP,
RMSEP and R2 of PLSR and PCR using this.
I also add this in library of R. How I can calculate R, MSEP, RMSEP and R2
of PLSR and PCR in R.
I s any other method then please also suggest me. Simply I want to
calculate these value.
Thanking you.
--
Nitish Kumar Mishra
Junior Research Fellow
BIC, IMTECH, Chandigarh, India
2017 Sep 05
2
Where to find the list of passes run by clang/opt with -O3
Hi,
I am trying to locate the passes run by clang/opt when it is passed the
option -O3. Can someone point me where to look at? Eventually, I want to
turn off just the LoopStrengthReduction pass in the -O3 set of default
passes.
Thanks,
Best Regards,
Nitish
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2017 Sep 13
1
Adding pragma related metadata to only one loop
Hi everyone,
I wanted to assign a new pragma for loops in clang. Let's call it
"#pragma XXX" which can be applied to any loop in the entire loop
hierarchy. I added the support for my pragma by following the same steps as
were being used in the default implementation of "unroll" pragma.
But now, when I compile any program using clang to llvm IR it attaches
the pragma
2009 Jun 19
1
typo in Lomb-Scargle periodogram implementation in spec.ls() from cts package?
Hello!
I tried to contact author of the package, but I got no reply. That is why I write it here. This might be useful for those who were using cts for spectral analysis of non-uniformly spaced data.
In file spec.ls.R from cts_1.0-1.tar.gz lines 59-60 are written as
pgram[k, i, j] <- 0.5 * ((sum(x[1:length(ti)]* cos(2 * pi * freq.temp[k] * (ti - tao))))^2/sum((cos(2 *
pi * freq.temp[k] *
2008 Jun 09
2
using spec.pgram
Hi everyone,
first of all, I would like to say that I am a newbie in R, so I apologize in
advance if my questions seem to be too easy for you.
Well, I'm looking for periodicity in histograms. I have histograms of
certain phenomenons and I'm asking whether a periodicity exists in these
data. So, I make a periodogram with the function spec.pgram. For instance,
if I have a histogram h, I
2007 Apr 10
1
Computing fundamental harmonics from a periodogram
Dear all,
I'm trying to finding the fundamental harmonics (ie. peaks in a
periodogram) from a time series (extracted from an mp3). For example,
if I look at
spectrum(fdeaths, spans = c(3,3))
I'd say the fundamental harmonics are about 1, 2, 3.5 and 4.5 - but
how can I extract these automatically? (preferably with some
heuristic for choosing the smoothing spans too)
I'm aware of
2004 Sep 15
1
lomb periodogram package
Hi,
Does anyone know the name of the package that
includes a function for computing the lomb periodogram on irregular
spaced ts data? I saw the package once ~ 1 month ago but cannot
find it now ...
,
Rich
2006 Sep 15
1
Periodogram of Schuster
Dear All,
Is there a function in R which can do a periodogram of Schuster ?
Thanks in advance !
Guillaume Blanchet
2013 Oct 28
0
[LLVMdev] Extracting libmachine from libcodegen (bug 1121)
Hi,
I did the Pass ID workaround by providing Passes.h in the
include/llvm/Machine. But the question which is holding me up is that, as
Ken Dyck was kind enough to point out, what should be done to the dependency
on libAnalysis? The Machine passes are not only dependent on Passes class
but also on others such as the ConstantFolding.h. Is it a possible solution
to break this dependency or carry
2008 Mar 27
6
help! - spectral analysis - spec.pgram
Can someone explain me this spec.pgram effect?
Code:
period.6<-c(0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10
,0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10,0,0,0,0,0,10)
period.5<-c(0,0,0,0,0,10,0,0,0,0,10,0,0,0,0,0,0,10,0,0,0,0,10,0,0,0,0,0,0,10
,0,0,0,0,10,0,0,0,0,0,0,10,0,0,0,0,10,0,0,0,0,0,0,10,0,0,0,0,10,0)
par(mfrow=c(2,1))
2009 Mar 03
1
periodogram smoothing question
Hello -
I am currently simulating bivariate AR(1) time series data and have the
following line in my code:
Px=spec.pgram(ts.union(X,XX),spans=c(?,?))
The spans option is where I enter in the vector containing the Daniell
smoother numbers, but I don't know what a Daniell smoother is (hence the
question marks). Can somebody please tell me?
Is there another option where I can simply enter in
2007 Apr 17
1
About PLR
Hello Sir/Mam
I am Nitish Kumar Mishra from IMTECH, Chandigarh, India. I want to
calculate the Principal Component Analysis(PCA), PLS of the input file and
find top 30 PCAs of this file using PLS in R. I am asking regarding
Linux(Red Hat 9) operating system.
I have downloaded PLS from Crains site and try to installed it, but don't
installed it.
How I can download and installed PLS(for PCA and
2006 Aug 15
1
A model for possibly periodic data with varying amplitude [repost, much edited]
Hi dear R community,
I have up to 12 measures of a protein for each of 6 patients, taken
every two or three days. The pattern of the protein looks periodic,
but the height of the peaks is highly variable. I'm testing for
periodicity using a Monte Carlo simulation envelope approach applied
to a cumulative periodogram. Now I want to predict the location of
the peaks in time. Of course, the
2006 Jan 24
1
spec.pgram() normalized too what?
Dear list,
What on earth is spec.pgram() normalized too? If you would like to skip my
proof as to why it's not normed too the mean squared or sum squared
amplitude of the discrete function a[], feel free too skip the rest of the
message. If it is, but you know why it's not exact in spec.pgram() when it
should be, skip the rest of this message. The issue I refer herein refers
only too a