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Matrix dimensions must agree Error
A is [8x8] and B is [8x1]. Do you mean to do the |mrdivide| operation, "/"? Or do you mean to do element-wise division "./"? If ...

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When loading .mat files in a parfor, the first time is way slower than the second time.
So you're doing something like this? for k = 1:10 mydata = load('myfile.mat'); output = someFunction(mydata); end T...

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How do I remove the brackets from the numeric values around the zeros, so that only the numeric values are left and I am able to use boolean logic to get a solution ( 1 or 0)?
Hmm, seems like this was an opportunity to apply what you learned yesterday regarding regexprep, if you're trying to remove/repl...

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how can I improve this code???!!!
You should try preallocating margin before the loop. You have only set the value to one element, of zero. Since it's not clear h...

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Finding series/pattern in an array
If you have the signal processing toolbox you can do this pretty easily using the functions risetime and pulsewidth. You just ha...

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Asking the error of 'Out of memory'
You are trying to allocate memory to a matrix for more memory than is available in your RAM. The solution completely depends upo...

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how to plot quiver evenly along lines?
I just took a closer look and it is what I suspected. In your loop over NL1 you are only storing the outputs, D1 and D2, for the...

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Linspace with varying increment
MATLAB provides functions that do basic things, like create linearly spaced vectors using the colon operator or linspace. It is ...

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Problem of finding lag when using xcorr
Yes, running this gives a max lag at 0. That is indicating that y matches x the best in their current positions. Shifting y by a...

대략 5년 전 | 1

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decrease calculation accuracy to speed up running time
The reason your algorithm is taking so much time is because of the line COPT(u+1,:)=[]; What happens when you delete an entry ...

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RLC Circuit Equation Implementation-Runge Kutta
Instead of this derriv_value = L*y(3)+R*y(2)+(1/C)*y; Do you mean this? derriv_value = L*y(3)+R*y(2)+(1/C)*y(1);

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Question about printing ode45 results
You have the vectors time, and u1d (etc) outside of the ode45 call. And you also have the output t from the ode45 call. So,you c...

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Output of mscohere function
Yes, these are the coherence values between the two channels at the frequencies returned in F. You can manually set the frequenc...

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Integration of Velocity data to Displacement
Use |cumtrapz| as in displacement = cumtrapz(velocity)/fs; % where fs is your sampling rate Then you can assess afterwar...

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How to change ONLY Xtick direction (or Ytick direction)
You have to set the properties of the specific axis. figure plot(1:10) ax = gca; xax = ax.XAxis; % xax = get(ax,'XAxis'); ...

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lines are not continuous
It's not perfect, but it might be sufficient. That's up to you. Play with the different values for dipreset. You might want to s...

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remove outliers form timeseries
If timevector is the name of your datetime vector, then you can mask out the outliers using timevector_good = timevector(~TF); ...

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Creating a color map of green and blue
Perhaps one of these colormap functions by Chad Greene would be useful to you: https://www.mathworks.com/matlabcentral/fileexch...

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How to remove the background noise from a signal?
Seems like you have determined what you want your threshold to be. You can set those values to zero (or whatever the mean of y...

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How can I remove the default transparency of graph edges?
set(P,'EdgeAlpha',1);

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How can I find the width of the peaks when presented with a digital signal-like plot?
Use the pulsewidth function with the argument MidPercentReferenceLevel set to 0 or 1 (the lowest value). Here is an example: x ...

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using variables in a parfor loop
I think it's because you're using d as the source and the sink in your loop, and you're assigning to d in a way that can make pr...

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Is there a way to use different sets of input arguments for one function?
It just requires you to check the type of each input argument. I think it would be easier to use a struct (or even an object) wi...

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EEG is a voltage signal in time domain (voltage amplitude vs time). how can we convert this EEG into amplitude vs frequency?
To convert from the time domain to the frequency domain, use the *fft* function. Though you might actually get more use out of t...

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EEG data preprocessing in matlab and EEGLAB
It seems pretty clear what the differences are. F is using a different file format. Choose your favourite. S is an option whethe...

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Signal Processing EEG ECG
One method would be to use a moving RMS calculation over a small time window. You should know what a reasonable rms value is (ba...

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Bandpass Filtering EEG Data
Here's your problem tmp(tmp==0)=NaN; Don't do that.

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How to Plot(Time, Voltage) so that transient is captured for different inputs
One possible idea is to use a multiple of the time constant for the circuit. For a parallel RLC circuit this is 2RC, and for ser...

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Smoothing a roughly sinusoidal signal
So are you saying you want to remove the frequency of the blue signal from the brown signal? Fairly easy, just use a notch/bands...

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Signal similarity analysis after cross correlation
Wouldn't it work just to set the threshold higher? It depends on what you mean by matching. If you want the exact same signal, ...

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