nirwana

Last seen: 28 Tage vor | Aktiv seit 2023

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how to find similiarity of peak/pattern time series?
I have two timeseries that looks like as below, my aim is how to correlate them for example to find daily peak and check if they...

etwa 2 Monate vor | 1 Antwort | 0

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How to Calculate dominant frequency and centroid frequency and plot them together
please help me, I would like to calculate dominant and centroid frequency and plot them tohether in one plot. Please CMIIW if i ...

10 Monate vor | 1 Antwort | 0

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help me to do nonlinear fitting use lsqcurvefit
please help me, I am begginer in matlab and thsi is my first time doing nonlinear fitting, I have problem to fit data with the m...

11 Monate vor | 1 Antwort | 0

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why envelope by hilbert increasing in tail of signal?
I have decay sinusiodal signal that I want to fit in, I use hilbert % Extract the ACF data % Calculate the starting and ending...

11 Monate vor | 1 Antwort | 0

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fittting data using nonlinear optimization fminsearch
I have data as below that i want to fit to nonlinear equation. in theory it says that this data can be fit by taking square enve...

11 Monate vor | 2 Antworten | 0

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The extrinsic function 'perms' is not available for standalone code generation.
I am trying generate mex file using matlab coder, where in my function i use function perms, but I get this problem The extrins...

mehr als ein Jahr vor | 2 Antworten | 0

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Unexpected matlab operator when using Matlab Coder
I use Matlab Coder to generate mex file, but in the middle of process I got error message "Unexpected MATLAB operator" that is i...

mehr als ein Jahr vor | 1 Antwort | 0

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failed to generate MEX function, generation of trial code failed
I am trying convert my matlab code in order to speed up thye computational time. let me describe my function is, first I read a...

mehr als ein Jahr vor | 1 Antwort | 0

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save tic toc in duration style
Hi all, I would like to save my computational time using tic toc but in format duration (i am trying to use duration but I don't...

mehr als ein Jahr vor | 2 Antworten | 0

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result spectrogram from lowpass filter still pass frequency above the treshold
I am trying use lowpass filter to my time series data and then i perform spectrogram to check wheater the signal still containin...

mehr als ein Jahr vor | 1 Antwort | 0

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combine spectrogram result in one figure
I have 20 min signal and would like to combine its sepectogram become one spectrogram consecutively. my idea is put index of eac...

mehr als ein Jahr vor | 1 Antwort | 0

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make figure spectrogram as length as signal above it
I would like to put spectogram result below the signal figure. I use specgram (in second row) and spectogram result in last row,...

mehr als ein Jahr vor | 0 Antworten | 0

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plotting data to get mahalanobis and eucledian distance
I get example from book to calculate mahalanobis and eucledian distance as shown below, but the book doesn't provide ilustration...

fast 2 Jahre vor | 1 Antwort | 0

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quadratic curvature doesn't went smoothly
Anyone can help me? I am trying to fit my data with first and second order polynomial, but the result of quadratic curvature do...

etwa 2 Jahre vor | 1 Antwort | 0

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why FFT result and IFFT result has diffrent in very small value? how to avoid this to increase precission?
I read from the book that IFFT from FFT result as ifft(ftt(signal)) wil give us the original signal. I try to substract both of...

etwa 2 Jahre vor | 1 Antwort | 0

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help me with for loop
I know this is very basic question, but i still has difficulty to answer it i try to add some fourier series to prove gibbs eff...

etwa 2 Jahre vor | 1 Antwort | 0

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error plotting, but succed when plotting order is change
I am tring to plot instantaneous freq using code below, subplot(311),instfreq(signal,srate,'Method','hilbert'); subplot(312),...

etwa 2 Jahre vor | 1 Antwort | 0

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sign in option in matlab does not work, i can not install adds on
I install matlab in fedora using student lisence from uni, but the sign in bar in the left side still no showing my ID. Also i...

etwa 2 Jahre vor | 1 Antwort | 0

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Help IFFT can not restore to original signal after filtering
I tried to compare original signal and signal after high pass filter using ifft. but the result seems odd to me. Can anyone expl...

etwa 2 Jahre vor | 1 Antwort | 0

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Why damping amplitude the amplitude shifting position of y azis
I damped the amplitude signal using by multiplied the freq with 0.5 after fft result, and returning the signal to time domain us...

etwa 2 Jahre vor | 1 Antwort | 0

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Meaning of manual hilbert transform
I am in early stage of learning hibert transform, and i sumarize the step of computing Hilbert is (CMIIW) : computing FFT of si...

etwa 2 Jahre vor | 0 Antworten | 0

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Why result of conv and point wise multiplication has different result?
I am comparing conf function and sum over point wise multiplication of two signal and then plot it. I end up with figure that ha...

etwa 2 Jahre vor | 2 Antworten | 0

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wny fft does't work with different signal?
I am using fft to extract freq content in my two type of time series. First, time series (file sig_fft.txt) look good and showin...

etwa 2 Jahre vor | 1 Antwort | 0

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How to put legend in subplot automaticaly using for end?
Can anyone help me how to put legend in left and right figure as shown below? Since this figure generate by looping (for-end), I...

etwa 2 Jahre vor | 1 Antwort | 0

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express ODE without set a m file function
Can someone explain this to me? actually this is part od example in the numerical book I found example in numerical book about ...

mehr als 2 Jahre vor | 2 Antworten | 0

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plot line with function but doesn't appear like i want
I have a figure below and i want to reproduce it using matlab figure . The diagonal line come from equation x/(sqrt(x^2+a^2...

mehr als 2 Jahre vor | 1 Antwort | 0

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set first derivative equal to zero with some constant
I have equation from derive from snellius law and i'd like to set its derivative equal to zero since fermat principle said so. ...

mehr als 2 Jahre vor | 1 Antwort | 0

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How to save result after run function for different input in matlab
I use a function with different input, but the input has no temp=[26.67 93.33 148.89 315.56]; visc=[1.35 0.085 0.012 0.00075]...

mehr als 2 Jahre vor | 1 Antwort | 0

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save animation into gif
hi...i wrote my function and making it as walking sine, and i'd like to save it as a gif. can anyone help me? close all t = l...

mehr als 2 Jahre vor | 1 Antwort | 0

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animated sine wave continously
Hi alll, i'd like to make sine wave with three variation and walk continously, but i end up make it uncontinously, here the scr...

mehr als 2 Jahre vor | 1 Antwort | 0

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