search for: harmonic

...nical testing, like this: - apply quasi-sinusoidal load - measure quasi-sinusoidal vertical and horizontal deformations (quasi-sinusoidal load means that load "should be" sinusoidal, but testing machine puts in some noise...) I enclose a sample of data at the end of this message. I used harmonic regression to fit the data: force = constant + [1st order Fourier harmonic] + [2nd order Fourier harmonic] + higher order harmonics... + error = = v0 + [a1 sin (2*pi*f*t) + b1 cos (2*pi*f*t) ] + [a2 sin (2*2*pi*f*t) + b2 cos (2*2*pi*f*t)] + ... + error where f is the frequency of the sinusoi...

Hello, I try to synthesize harmonic functions with a subset of frequencies determined by fast fourier transform. I wrote two different functions, a looped version and a matrix multiplication version. As an example the looped version takes 5 sec and the matrix-version takes 3-4 sec (R 1.4, Athlon 1.2 GHz, 256 MB, Win ME), but the latt...

I am looking for a package to perform harmonic analysis with the goal of estimating the period of the dominant high frequency component in some mono-channel signals. I guess there are presumably a number of CRAN packages allowing for such analysis. However, my search with keywords was not successfull. It brought up a lot of Fourier miscellanea...

Dear R Users, I have a CO2 time series. I want to fit this series seasonal cycle and trend with fourth harmonic function, and then compute residuals. I am doing something like: file<-read.csv("co2data.csv") names(file) attach(file) fit<-lm(co2~1+time+I(time^2)+sin(2*pi*time)+cos(2*pi*time)+sin(4*pi*time)+cos(4*pi*time)+ sin(6*pi*time)+cos(6*pi*time)+sin(8*pi*time)+cos(8*pi*time),data=file)...

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 s...

...from a new installed fda library and include sessionInfo() below. This is from the script fdarm-ch09.R - I seem to have got not fda_2.2.8 but 2.2.7 - is that the problem? Where do I get .8 as I just reinstalled? Best wishes Troels Ring, Nephrology Aalborg, Denmark > betavar = coefvar[2]*harmonics[1]^2 + coefvar[3]*harmonics[2]^2 + + coefvar[4]*harmonics[3]^2 Error in `^.fd`(harmonics[1], 2) : FDOBJ does not have a spline basis. > sessionInfo() R version 2.15.0 (2012-03-30) Platform: x86_64-pc-mingw32/x64 (64-bit) locale: [1] LC_COLLATE=Danish_Denmark.1252 LC_CTYPE=Danish_D...

...of intersection. I have a wave function monitored from the heart beat in a particular interval of times.?Apart?fom that, there is?a line with positive slope (e.g: y = x+2) which lies across the wave and intersect on a number of points. My problem is i have no exact equation for?such a?complex harmonic wave produced by the heart pulse and so, cannot manage to find the intersection points. Therefore, i would be very grateful if someone could give some ideas or might suggest any?packages in? R that can assist me to do so. Thank you, Fir

...ntly obtain theorectical value. This is possible by more judicious use of the loudness.sci script, combined with more modelling of filter operation in scilab. Such a test would verify that the performance of the replay gain analyser is actually correct. There is only one test to verify handling of harmonics of the filter table sampling frequencies. Signed-off-by: Earl Chew <earl_chew at yahoo.com> --- ?test/test_metaflac.sh |?? 86 +++++++++++++++++++++++++++++++++++++++++++++++++ ?1 files changed, 86 insertions(+), 0 deletions(-) diff --git a/test/test_metaflac.sh b/test/test_metaflac.sh inde...

Dear all: Does anyone has harmonic regresssion analysis package written in R (to be used in Windows platform) ? Thanks _______________________________________ YM - Â÷½u°T®§ ´Nºâ§A¨S¦³¤Wºô¡A§AªºªB¤Í¤´¥i¥H¯d¤U°T®§µ¹§A¡A·í§A¤Wºô®É´N¯à¥ß§Y¬Ý¨ì¡A¥ô¦ó»¡¸Ü³£ÉN¨«¥¢¡C http://messenger.yahoo.com.hk [[alternative HTML version delet...

Dear All, I have some time series data where X=month and Y=nutrient concentration (I can have several concentration data for one month). Is there a way to fit for it an Harmonic Function. Is there a package, script,etc which I can use? Thx -- View this message in context: http://r.789695.n4.nabble.com/Fitting-a-Harmonic-Function-to-Time-Series-Data-tp3901266p3901266.html Sent from the R help mailing list archive at Nabble.com.

On Feb 8, 2010, at 8:51 PM, Duncan Sands wrote: > this can be done using debug info. Check out > http://llvm.org/docs/SourceLevelDebugging.html Wow, that threw me for a loop. I'm using the 2.6 release, thinking I was up to date, but its debug output doesn't look anything like what's described in the above link. It appears to document the upcoming 2.7 version, which

On Feb 9, 2010, at 11:13 AM, Trevor Harmon wrote: > Is there any information about these changes and why they were > necessary? I think I found it: http://nondot.org/~sabre/LLVMNotes/EmbeddedMetadata.txt Still looking for an API to access the metadata... Trevor

I just finished testing and integrating Speex into our test project. Speex works excellent and sounds great for the bitrate. I have noticed, however, on cheaper microphones that Speex will produce loud static noise at high harmonics/amplitude in the sound. Is there some setting to prevent this static? I don't have this problem with various other manufacturer voice coders that I am using in the test project. It only happens when someone makes a loud noise into the microphone and the microphone isn't top quality or h...

An idea would be like for WMA 9 lower bitrates (32-42-48Kbps) to use a 'crystallizer'; which is basically a harmonics booster focussed at transposing sharp tones some octaves higher. Eg: A file has been recorded @ 20khz computer (or 10khz real life) to preserve space. While playing back the file sounds a bit mushy, almost as if someone was speaking through a cardboard wall. The higher frequencies are missing,...

...quick note at this point: Not the acceleration by itself but the quick acceleration changes are the components which make up the special stress we want to quantify. So what I would like to do is: 1) Apply a fourier transformation to the acceleration profile to 2) get a number of harmonic waves describing my graph 3) and use the amplitudes of my waves in a weighted fashion to calculate some statistical value. What I tried to do is: A) construct an artificial profile fg for testing purpose like a. f1 <- function(x) 0.5*sin(3*x + pi) b. f2 <- functi...

Hello list; I am working with a dataset containing animal locations over time for a large number of individuals. I would like to compute a center of activity by finding the minimum harmonic mean on a grid overlaying the points of an animal (a "standard" to express center of activity in animal ecology). I have searched the archives at Jonathan Barons server but have not been able to find any package that seem to include such a function. Do anyone of you know of such a fu...

I' need to smooth a serie univariate with harmonic regression, but i do not know if it exists somepeople know in R this type of regression, not in S-plus. Thank's _________________________________________________________

Hi, I was wondering if it is possible to harmonize the ouput of symbols() and legend() both from the graphics package. Let us take this example: x<-runif(10) y<-runif(10) z<-runif(10) leg<-round(seq(min(z),max(z),l=4),2) # 4 values rounded up to 2 decimals for the legend symbols(x,y,circles=z,inches=0.2) legend("topright",legend=leg,pch=1,pt.cex=leg/max(leg)*2) #

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Dear R-helpers, I have time series data from 16 subjects and 2 treatment groups. The seasonal variation can be best described by two harmonics, I called the frequencies omega and omega2. I now want to test whether (1) the seasonal pattern differs between the treatments (some kind of overall test). If this is the case, (2) I want to conduct tests to find out whether the amplitude of the fist harmonic, the amplitude of the second harmo...