Bjorn Roche
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 Jan 9 awarded Tumbleweed Jan 2 asked Is exponential decay a moving average filter? Sep 24 awarded Autobiographer May 2 comment Wavelet or FFT for Transient signal analysis? I'm not sure you would have a nice, closed form solution like you have here with wavelets. Is there some specific problem with your current method that you are trying to address other than wanting something better in some vague transient sense? Jan 23 awarded Commentator Jan 23 comment Bandpass filter with Fourier and inverse. I would follow the instructions from the basic audio eqs link. You want to create a low-pass filter with a cutoff of 3Hz. You can use the FFT you did above to check your results. Jan 23 comment Bandpass filter with Fourier and inverse. You can filter in the time or frequency domain. Judging by the posts around here people tend to try to filter in the frequency domain first because that makes intuitive sense, but The time domain is generally better approach. Jan 20 answered Bandpass filter with Fourier and inverse. Aug 5 comment Adjustable Sigmoid Curve (S-Curve) from $(0,0)$ to $(1,1)$ Both plots you link use .5*5sin(10x/pi), for g(x), which is not correct even for x<.5 Aug 5 answered Adjustable Sigmoid Curve (S-Curve) from $(0,0)$ to $(1,1)$ Jun 17 comment Using FFT in matlab If a question is mathematical, this is a fine place for MatLab questions as far as I know. This particular question might also fit well (better?) on dsp.stackexchange.com. Apr 26 comment Is the convolution an invertible operation? Just a note about the practical implications: the process known as deconvolution exists and tends to be sensitive to noise unless special care is taken and something is known about the signal and/or noise. Feb 27 comment Relationship between DFT index values, frequency in a Fourier series and Hz. This explanation with code may help you: blog.bjornroche.com/2012/07/… Dec 2 answered Removing noise when the signal is not smooth Dec 2 comment Removing noise when the signal is not smooth I think this is a signal processing problem first and then a statistics question. Aug 6 awarded Teacher Aug 3 awarded Supporter Aug 3 comment Integration of sawtooth, square and triangle wave functions great answer! Upvoted. Aug 2 answered Integration of sawtooth, square and triangle wave functions