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write a three_max function
There are several issues with your code. It does not return an output. It overloads the max() function, which can lead to conf...

6 years 前 | 0

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Low Pass filter not working
You show a figure that essentially looks like the following (also attached): fs = 1000; t = 0:1/fs:10; x = sin(2*pi*10*t); X...

6 years 前 | 0

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regexprep does not exactly what I want
There's definitely a way to do it using regexprep, but I found this solution first, so hopefully it is sufficient. Charge =...

6 years 前 | 0

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Remove spikes from a matrix.
My version of nanmean only goes up to line 22 in R2019a, so I'm not sure what you have. Perhaps someone has written an overloade...

6 years 前 | 1

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Audio sounds similar in volume before and after filtration of the most energetic frequency band
This has been solved. The answer was poor speakers and human threshold of hearing stow frequencies (as per the comments above).

6 years 前 | 0

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identifying the continuous sweep's envelope
I've had success using *PaddedHilbert* on the file exchange in the past. <https://www.mathworks.com/matlabcentral/fileexchange/...

6 years 前 | 0

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calculating residual between two time domain signals
It's unclear what you're trying to achieve, but yes that how to calculate the residuals (the difference between the observed val...

6 years 前 | 1

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incorrect result of fft phase calculation
I made only a few changes to your code and got satisfactory results. Nfft = length(Yin); The zero padding was doing odd things ...

6 years 前 | 0

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Signal filtering, smoothing and delay
I created a butterworth filter using filterDesigner, with the following parameters: Bandpass, IIR - Butterworth, specify order: ...

6 years 前 | 0

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Find and count how many capital characters are in str, and then change them to lower cases USING LOOPS
s = 'This is my String with CapiTal LETTERS in it. Let''s change them to lowercase uSiNg LoOpS.' [caps,inds] = regexp(s,'...

6 years 前 | 0

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Count how many ‘a’ are in str and eliminate those ‘a’
s = 'I have an apple'; [a,b] = regexp(s,'a','split'); numA = length(b); sentenceWithoutA = strjoin(a);

6 years 前 | 0

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Extracting selected parts from text - regular expressions
This will remove a space followed by any numbers followed by a dot follow by another number. regexprep(myText,' [0-9]*.[0-9...

6 years 前 | 0

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How can I use conditional operators to improve my code?
N = [1:n]; s = [N;N;factorial(N)]; fprintf('For N = %d, %d! = %d\n',s);

6 years 前 | 0

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signum fuction with multiple input variables
If the set of v are the same size, then y = sign([v1,v2,v3]);

6 years 前 | 0

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how to sum data with condition
This is silly. But not difficult to implement. x = [1 100; 1 101 ; 1 102; 2 109 ; 2 116 ; 2 118 ; 2 120 ; 3 103; 3 106]; y = x...

6 years 前 | 0

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How do I break the line for every 50th row in a matrix
Fairly simple. Just need to reshape the variables. Here is an example: d = 10; x = repmat(1:d,1,d)'; y = [sin(x)]; t = 1:len...

6 years 前 | 0

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Index 2D matrix along line rotated about the matrix midpoint
360/(N-1) doesn't make sense. What if N = 8? I think you just mean 180. But it's irrelevant. It would not be efficient to recrea...

6 years 前 | 0

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Why can't I solve this, it's simple. (Incorrect dimensions.... use .^) (I did then it says Invalid Operator.......)
This works fine: z = ((x+1).^y)-(x.^y); You should read a bit on the difference between array and matrix operations. https://...

6 years 前 | 0

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incorrect result of fft phase calculation
There are two issues at play. The first is a trade-off between temporal resolution and spectral resolution. Your sampling freque...

6 years 前 | 0

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How to correct error in port width or dimension in simulink?
Reshape the signal going into 'ref' with a Reshape block, and select column vector as the output dimensionality.

6 years 前 | 0

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Function for even or odd numbers
function y = iseven(v) y = all(~mod(v,2)); end

6 years 前 | 0

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List comprehension-like function in assigning values in nested structures
You'll find the answer in this article on comma-separated lists, specifically with the _deal()_ function. <https://www.mathwork...

6 years 前 | 1

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How to stop for-loop outside of the loop?
Sounds like you want a GUI of a stop watch. https://www.mathworks.com/matlabcentral/fileexchange/12628-stopwatch

6 years 前 | 0

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Multiple Summation of Series using For Loops
Very close. You need to reset the value of s for each y. I also cleaned it up a bit. This now produces the specified figure. c...

6 years 前 | 0

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how i implement this equation.
Why do you want a loop to do this simple equation anyways? Ok here you go... clearvars; Ne = 9; Ni = 100; Eci = rand(Ni,Ne);...

6 years 前 | 0

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Error using odearguments (line 113) Inputs must be floats, namely single or double.
Your function dynamics takes as inputs x and y, but instead uses t and y. So fix that. You are also passing in a symbolic value...

6 years 前 | 0

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Find the two nearest points from an array given a value
[~,k] = mink(abs(A-0.1400),2);

6 years 前 | 4

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How to filter data using rmoutliers?
If you have a hard threshold you want to use, then rmoutliers is not the function you want. Just use a simple logical index to g...

6 years 前 | 1

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Calculate the FFT of an ECG signal
I haven't ran your code but the plot looks pretty normal. The peak you see around 0 Hz is a DC component added to your signal. Y...

6 years 前 | 1

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How vectorize this operation
If you have the signal toolbox, you can use the buffer() command to an array of the x values that you require, then do the matri...

6 years 前 | 0