similar to: Fitting a sine wave using solver

Dear R-helpers ? I have 7 data points that I want to fit a continuous curve to, that should look similar to a sine wave My data points would mark the local minima and maxima respectively. This is what I?ve got so far. And I would keep doing so, but sadly nls() then says that it has reached the maximum number of Iterations? ?

I have been attempting to estimate the periodic contribution of an effect to some data but have not been able to fit a sine wave within R. It would be nice to start by being able to fit a sine wave with an amplitude and frequency. x<-seq(0,20,by=0.5) y<-2*sin(2*pi*.5*x) #amplitude =2, frequency=0.5 # This failed to converge r<-nls(y ~ A*sin(2*pi*F*x), start=list(A = 1, F = 1),

On Thu, 2005-01-13 at 12:42 -0500, Jean-Marc Valin wrote: > Le jeudi 13 janvier 2005 ? 10:59 -0500, Jared Whitby a ?crit : > > Interestingly enough.. I started playing around with preprocessing > > options in 1.1.6 and happened upon the denoise filter > > (SPEEX_PREPROCESS_SET_DENOISE). When i run the test tone using that > > option it is completely filtered out and I

Hi, Is there a package to perform a sine function fitting to XY data? Thx, Ashz -- View this message in context: http://r.789695.n4.nabble.com/Sine-function-fitting-tp3000156p3000156.html Sent from the R help mailing list archive at Nabble.com.

I wonder if anybody try to compress a pure sine wave using OPUS codec. When I compressed the mono 1KHz, 16bits 48000 samples per sec. audio stream using the 'opus_demo' utility: opus_demo -e audio 48000 1 2min_1kHz_Sine_16bit_48kHz.wave 2min_1kHz_Sine_16bit_48kHz.opus_raw I had the output stream that is shown below. 00 00 00 01 00 00 00 00 78 00 00 00 01 00 00 00 00 78 00 00 00 01 00

Well I think a sinusoid shouldn't totally trash the encoder state, so I still think theres a bug lurking around in there. The denoiser just prevents it from ever making it to the encoder. Just from browsing through the speex code and from what I've learned reading through the mailing list, it looks like there are a few places where checks are in place to prevent sinusoids from

On 02/08/16 10:59 AM, Kolesov, Alexander wrote: > opus_demo -e audio 48000 1 2min_1kHz_Sine_16bit_48kHz.wave > 2min_1kHz_Sine_16bit_48kHz.opus_raw You're missing the "bitrate" argument to opus_demo... Though I'm surprised it didn't complain about it. Jean-Marc

I am currently using speex and ogg to archive voice data. The data comes in PCM ulaw at 8kHz and I use a table look up to convert it to normal 16-bit PCM data. Whenver the sound coming in is voice everything works perfectly. However, we periodically run test signals through our system to determine link problems.. etc. This test signal totally hoses speex during playback, but only when you try to

Hello, I am author of a Morse code training software written in Perl at http://starling.ws/morse Currently I output to *.wav and, if on Unix, convert to *.ogg. And that's okay for a trainer. But I have desire to upgrade the project to a real-time communication tool...or at least a Morse code audio mail routine. And I should like to avoid *.wav. I'd like some means of writing a pure

Hi everyone, I am trying to fit a sine function on one year of wind data. I have two questions below. Looking around on the net I managed to get the following: Sine Equation: y = a + b * sin( c + d*x ) b is the amplitude, c is the phase shift, d is something deal with periodicty of data*.* This can be linearised by sin( c+dx ) = cos(c) * sin(dx) + sin(c) * cos(dx). If one calls dx = x1 y

Dear R-users, I'd like to fit a sine function to my data. The result should have a format (and thus the formula, too) y ~ a + sin(x+b) where y and x are vectors, and a and b are (yet) unknown values. The data sets (vectors x and y) are OK, and I can do a simple lm fitting lm(y~x), or lm(y~I(sin(2*pi*x/360))), succesfully My issue is that I'm not able to do the optional linear shift in

Hi, there is an interesting case when the FLAC encoder (using 1.2.0) is given simple waves. Simple waves means: I have a list of {frequency, duration, pause} tuples that define the monophonic tune. In other words, exactly one frequency is played at a time. This is the original dataset from 1989 (driving a PC speaker back then): $ ls -l ihold.sd -rw-r--r-- 1 jengelh users 20616 Aug 14 00:57

Le jeudi 13 janvier 2005 ? 10:59 -0500, Jared Whitby a ?crit : > Interestingly enough.. I started playing around with preprocessing > options in 1.1.6 and happened upon the denoise filter > (SPEEX_PREPROCESS_SET_DENOISE). When i run the test tone using that > option it is completely filtered out and I just get (complete) > silence. When the test tone is intermixed with regular voice

Hello, I'm trying to generate a sine wave in R to fit my observations using the general formula: y=a*sin(b[x+h*pi)]+k where a = amplitude, b=period, h=phase shift, and k=vertical shift I want to use following translation to bring the sine function up onto the y-axis to range from 0-1, and this will place the wave on the x-axis from 0-pi/2. y=1/2sin(2[x+ 1/4*pi]) + 1/2 Additionally, I need

Hello! I'm collecting data on a refrigerator that I'm using to cure meat. Specifically I am collection humidity and temperature readings. The temperature readings look sinusoidal (due to the refrigerator turning on and off). I'd like to calculate the frequency and period of the wave so that I can determine if modifications I make to the equipment are increasing or decreasing

Hi Jean-Marc, my answers: see below. Any good ideas how I should proceed? Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> hat am 1. Februar 2010 um 13:09 geschrieben: > Hi Frank, > > On 2010-02-01 05:56, Frank Lorenz wrote: > > I get really strange results when comparing floating and fixed point > > versions of interal variables of the ltp, so either something is

Hello list, I am making scatterplots of data that vary sinusoidally over 24 hours. With a bit of previous help from this list, I now can get an x-axis with time tics from 00:00 on the left edge to 12:00 in the middle and 00:00 on the right edge, i.e., just 24 hours. Now I would like to fit a sin function to the plot. I've looked all over CRAN and the web in general, but have not found a

Interestingly enough.. I started playing around with preprocessing options in 1.1.6 and happened upon the denoise filter (SPEEX_PREPROCESS_SET_DENOISE). When i run the test tone using that option it is completely filtered out and I just get (complete) silence. When the test tone is intermixed with regular voice I only get the voice. So while i still don't quite understand why the test tone

Hi Jean-Marc, dBFS means dB relative to digital full scale. In other words: a sine value of -42 dBFS will, on a 16 bit PCM signal, swing between 131 and -131 only (16384 * 10^(-42/20)) So we are far below +/-8000. At the moment, I'm out of ideas how to debug systematically. That even very small rounding errors alter pitch values fundamentally makes the situation worse for me, because it

You mean the "real" (not the synthesized) residual? What is odd in your opinion? These glitches I mentioned or something else? I replaced the interpolated lpc (variable "interp_lpc") with the original lpc (variable lpc) for residual generation. This makes the situation worse, so lpc interpolation seems to "smooth" the error and reduces it. I will check the