similar to: Solving Yis[i] = a*cos((2*pi/T)*(times[i] - Tau)) + ...

Hi, I have recently used the CTS package in order to use the Lomb-Scargle periodogram (spec.ls) function. I have noticed an issue that I hoped you may be able to explain. If a regularly spaced time series has two points removed, one at either side of a single data point (thus making an irregularly spaced time series), a spectrum with a very large peak at the highest frequencies is produced. An

Dear All, I'm trying to create this: I've these data (a, b,c, etc. are numbers) : 1 a b 2 c d f 3 g 4 h ... N I'm trying to create the all "time series permutations" (length = N) taking account the possibilities for each value. For example (N=4), 1 a 2 c 3 g 4 h next, 1 b 2 c 3 g 4 h next 1 a 2 d 3 g 4 h and so on. For this example, there are

Hola a todos, Estoy trabajando con modelos lineales generalizados (GLM), en particular con las funciones glm y anova.glm de R. Tengo una pregunta que es más bien técnica en el sentido estadístico (y un poco Off Topic y probablemente un tanto naive). No tengo claro si es correcto decir análisis de varianza o de devianza al utilizar GLMs, veo que en el help de anova.glm dice análisis de

Hello everybody, I recently wrote a "program" that to generate AR1 time series, here the code: #By Jomopo. Junio-2007, Leioa, Vizcaya #This program to create the AR1 syntetic series (one by one) #Where the mean is zero, but the variance of the serie AR1 and #the coef. of AR1 are be changed. If var serie AR1 = 1 then is standarized! #Final version for AR1 time series program #Mon Jul

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

Hola, estoy haciendo un estudio de la desaceleración de la mortalidad y tengo dudas con la función nls(), adjunto un archivo donde he redactado mi inquietud. saludos cordiales Boris Polanco ------------ próxima parte ------------ Se ha borrado un adjunto en formato HTML... URL: <https://stat.ethz.ch/pipermail/r-help-es/attachments/20141015/b9761c95/attachment-0001.html> ------------ próxima

Hi all, I am trying to do wavelets and I got an error message saying "The length of data is not a power of 2" Is there a way of handing that? or should the data length be exactly the power of 2? I am using R version 2.9.2 (2009-08-24) The is library(wavethresh). wds <- wd(ds$v,filter.number=1) Thanks

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] *

Greetings all, I am using Fourier analysis to search for periodicities in IP network traffic by generating periodograms and then visually examining them for large, distinct peaks. However, in many cases it is not readily apparent where there are periodicities. I have no experience with discrete maths so I've come up against a block here: How do I define what the "noise floor"

Dear R users Is there a function in R to make a peridogram for a spectral analysis of unevenlly sampled data?? something like spec.lomb() for S-Plus?? How to plot a vector with unequally spaced time series?? e.g day/month/year V1 03/08/82 0.34 28/08/82 1.42 12/09/82 0.28 20/09/82 0.56 03/10/82 0.85 21/10/82 1.45 thanks -- Marcelo Alexandre Bruno - Pos-graduacao Oceanografia Biologica

Dear time-series specialist: I've got some time series representing measurements from a physical process, like atomic decay data. These time series look almost random, but should hopefully be distinguishable as they were taken under different conditions. I am looking for statistical approaches that are sensitive enough to discriminate between such series of measurements. Preferably, there

Hola, quisiera que me dijeran como puedo mandarle unos datos al R, de una aplicación en java. "La educación es lo que queda cuando uno se olvida de todo lo que aprendió en la escuela." [[alternative HTML version deleted]]

Hello everybody, I want to save a graphic using the "pdf environment", everything in order, but I can not to save the graph in "horizontal" way. I have read the manual (to plot, par), the FAQ, google, but nothing I found that can help me. Anyone can say me a hint? Thanks a lot, -- Josue [[alternative HTML version deleted]]

Greetings all, I'm working on a project trying to apply fourier analysis to timestamped router logs, using R to perform the analysis. The idea is to determine if any type of traffic (say, outgoing ICMP requests) has strong periodic features because it may indicate a compromise somewhere on the network. The FFT requires all data points to be evenly spaced, but the recorded events do not

Javier hay algo que no entiendo, no aclaras bien porque el filtrado por fechas para modificar el valor de un campo según su valor actual, sino aclaras bien eso las soluciones que te brinden por buenas que sean puede que no resuelvan el problema porque va a satisfacer totalmente los casos, igual por lo que dices no entiendo lo de las fechas, solo vas a rectificar los valores erróneos de fechas

Background: OS: Linux Mandrake 9.1 release: R 1.9.0 editor: Xemacs 21.4 frontend: ESS 5.1.23 --------------------------------- Colleagues I have two time series (upwelling index and water temperature) of evenly spaced, daily data over 18 months, but the upwelling index series has a gap of about 2 months right in the middle of it. I want to do the acf, pacf, ccf, and a cross-spectral analysis

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

Hello there. This is just to ask if Samba is supported for running on AIX 4.3.3 (IBM RS6000) Looking forward to get news from you Regards UGS PLM Solutions MAURICIO PINEDA Technical Application Engineer Unigraphics Solutions Mexico. Campos Eliseos #1A piso 3 Col. Polanco Chapultep?c. Miguel Hidalgo, M?xico D.F. 11560 Phone: (5255) 52419911 ext 218 ? 214 Fax: (5255) 55453868 Mail

Hello to everybody, I just subscribed to this list. I find R a really nice environment for statistical analysis. I started to use it some days ago. I use it at home in my Linux box, but I would like to use it in my institute in my Digital Alpha (my machine runs OSF1 V4.0). I tried to compile the distributed source code, without success due to some errors. And the binary available is in RPM

hi R users I have a large 1D dataset and some of them is NA value . I found I cound get the spectrum by such a command. ua=c£¨10£¬30 £¬40£¬50£¬NA£© spectrum(ua) and I could not use na.rm just like mean or sd function How could I get the spectrum of ua ? thank you . -- TANG Jie [[alternative HTML version deleted]]