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How can i delay a signal?
You could do something simple like: s = exp(-a*(t-t0)).*sin(2*pi*(t-t0)/T); and tweak t0 to be whatever time you need th...

거의 7년 전 | 0

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Power Spectrum of Colored Noises
I think you're looking for a PSD. Try |periodogram(white_noise)| or |periodogram(white_noise,[],[],Fs)|

거의 7년 전 | 0

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Why i can't plot a spectrum of a rectangular window function?
If you line up the frequency points, you'll see that your FFT is showing the zeros only. If you crank up the number of points i...

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Fill gaps with zeros in a non-consecutive time series
This should get you started: function y = pennyanswer(x) validateattributes(x,{'numeric'},{'row','finite','integer','n...

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Find K smallest elements in a vector where K is very small
You may simply be looking for <https://www.mathworks.com/help/matlab/ref/mink.html mink>.

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How to remove jumps and bring the data down?
I tried this with hampel and finchangepts. Seemed to work okay. % load data attached at top of question load spike_jump...

거의 7년 전 | 0

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Steady state data filtering
If you have a version of MATLAB beyond R2017b you can try removing outliers with <https://www.mathworks.com/help/matlab/ref/fi...

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Clearing plotCoverageArea plot in each loop while keeping a previous birdsEyePlot in the figure
Hi Haroon, Don't create a new plotter every time in the loop. Just use plotCoverageArea() inside the loop for the coverage a...

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Runtime update of waypoints/path in drivingScenario
If you want to control the position/orientation of any specific actor you can set its properties yourself instead of defining a ...

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Using a single figure frame for chasePlot used inside a loop
If you have a handle to the axes you are using you can pass it to the 'Parent' property of the chasePlot when you construct it. ...

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Hamming filter to reduce ringing artifact in image
Windows are designed to smooth out the transition between the content and the zero-padded region, so apply them just to the data...

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Differenz between interpolation and resampling
The default filter has 10 taps. If you increase it, you can reduce the amplitude of the ringing. The (P,Q,N,Beta) syntax might...

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is it possible to upsampling or down sampling by a non-integer number?
In case someone else is looking at this... have a look at <http://www.mathworks.com/help/signal/ref/resample.html resample>.

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What does MinThreshold parameter explain in FindChangePts function (in matlab2017R)?
Perhaps an example is in order. Let's say you have a signal and you are looking for the most significant changes in mean. A ...

7년 초과 전 | 4

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I have a problem of the function findpeaks R2015b : it does not detect the flat peaks like in the version of R2013b
Hi Salma, Hopefully its not too late to ask you, but if perhaps you can post your data or contact technical support we can t...

7년 초과 전 | 0

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Need to spline, wondering if possible to do this in a "best fit" way.
Try using <https://www.mathworks.com/help/signal/ref/sgolayfilt.html sgolayfilt> in the Signal Processing Toolbox.

7년 초과 전 | 0

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Detection of large amplitudes
Looks like you're interested in finding changes in variance. If you have the Signal Processing Toolbox, try something like: ...

7년 초과 전 | 1

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piece-wise linear fitting
Have you tried FINDCHANGEPTS in the Signal Processing Toolbox, and how well does it fit your middle segment?

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Help with cusum and cellfun
I realize this may be a bit late, but in case someone else is looking for a solution, this worked for me: % make so...

7년 초과 전 | 0

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how to calculate RMS value of a signal
Try using "rms" in the Signal Processing Toolbox.

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Sort Coplanar 3D Points Clockwise
I'd probably just project to 2D first and just take the X/Y from there. I'm not sure if the indices need to be sorted first eit...

7년 초과 전 | 0

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In using spectrogram, what is the difference between specifying option 'power' and 'psd'?
The first output is always the (unmodified) STFT. The 'power' and 'psd' and 'reassign' flags only affect the later outputs ...

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Why is my code identifies only few peaks?
you probably should also subtract the mean from the value you passed to 'minpeakheight' if you want it to track the data.

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find local max in time window
If you have a recent copy of MATLAB, try using movmax().

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How do I count repeated familiar signals?
Try FINDSIGNAL in the Signal Processing Toolbox.

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Filtering out a Specific Sound from a Audio File
Use periodogram to figure out the frequencies. Then: load buzzjc %soundsc(f,fs) n = numel(f); fold = f; ...

7년 초과 전 | 1

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Improve performance of my code
There is a version of DTW in the Signal Processing Toolbox that can accommodate multivariate data, it also has a version for sea...

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I need to code a1, a2, a3 = 0. any idea how to do this? I've read about deal, but it seems too long to code 19-20 "a" variables.
How about putting them into a vector? % put them into a vector r = [1.27 1.35 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2....

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Error using * Inner matrix dimensions must agree? It also shows an error for Y, but I can't figure out what it is?
It looks like you want to use ".*" instead of "*" and "./" instead of "/".

7년 초과 전 | 0

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Does the dynamic time warping function of Matlab normalize for different dimensions before performing DTW?
Not in DTW directly. FINDSIGNAL has a variant that calls DTW and it has some basic normalization.

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