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Interweave two arrays in a specific pattern
x = [1:160]'; y = x; xx = reshape(x,16,[])'; yy = reshape(y,16,[])'; zz = [xx,yy]'; z = zz(:);

más de 4 años hace | 0

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it's plotting empty figures
I made some adjustments. Let me know if this is close to what you want. tau = [1.5, 2]; figure for t = 1:length(tau) ...

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Merging vectors into one
Simple: x = 1:10; y = x + 10; % for example % x and y are both [1x10] row vectors as you mentioned z = [x(:), y(:)]; % z i...

más de 4 años hace | 1

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ECG spectrum wrong?
I'm not sure how you're doing your notch filters, but try this: Fs = 625; % or whatever your sampling frequency is. Fn = Fs/2;...

más de 4 años hace | 1

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How to avoid error when whether the function has returns is unknown?
You can use *nargout*(|Function|) to check the number of output arguments. <https://www.mathworks.com/help/matlab/ref/nargout.h...

más de 4 años hace | 0

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eval(sprintf('left = X+X%d+X%d+X%d+X%d+X%d+X%d', i==1:6)); throws error Undefined function or variable 'X0'. why
Forget about it. <https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically...

más de 4 años hace | 1

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Yet another "Dot indexing is not supported for variables of this type"
First of all, bravo for posting a very comprehensive question that is self-contained. Most people don't do this and it makes it ...

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time series fatigue test
You can follow this example: lb = 5; % lower bound, ymin ub = 10; % upper bound N = 1000; % num samples vals = ran...

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Dear fellows i am removing noise from( 3-200)HZ.
Let me link back to the previous time you asked this question, so other contributors can see the solution already provided. htt...

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Plotting continious-time signal
That's correct. You plotted three signals, with angular frequency of pi, 3/2*pi, and 2*pi rad/s. This corresponds to frequency o...

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How to replace a string with another string in specific table columns
t{:,index} = regexprep(t{:,index},'\[\]','-99')

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Cody question help: Remove all the words that end with "ain"
You are overcomplicating things. You have it with this expression regexp(s1, '\w*ain\>') But that just returns a set of indice...

más de 4 años hace | 0

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Non constant Sampling Frequency in FFT of Amplitude Modulation
Why do you want a non-constant sampling frequency? I don't understand the advantages of that, and there are plenty of disadvanta...

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storing for loop answer into matrix
It would often be much faster for you to just look up the documentation than to post a question here and wait for an answer. I s...

más de 4 años hace | 1

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How to display values from a chart into the command window
If you want the end value, then do coord = [x(end) y(end) z(end)] If you want the value when z = 0, assuming it equals e...

más de 4 años hace | 0

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Creating permutations of vectors using basic matlab commands such as loops.
You can do it in two lines of code by using *ndgrid*, and putting the four outputs column-wise into a matrix. That would be the ...

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Why is this fprintf not wprking correctly?
array = [studentNames;string(TotalAvg)]; fprintf('%s has an avg of %g\r\n',array);

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How to make a new stop in a vector when matlab reads a specific symbol?
help str2double help cell2mat

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Output argument "y" (and maybe others) not assigned during call
What is the function supposed to return for y = ycal(1,0,0)? It doesn't pass any of the conditionals in the if statement. And si...

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Scatter doen not plot!
Put this line _outside_ the loop over |swarm.nb_drones|, or only the last iteration will be non zero. self.wake = zeros(10,...

más de 4 años hace | 1

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ECG spectrum wrong?
I'd say it looks fairly normal once you notch filter the line noise. But there is other preprocessing to do, like a low pass fil...

más de 4 años hace | 2

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how can i make an array of frequency after doing fft which helps to identify the keypad number? i have included my script
You would have to calibrate each keypad to a specific frequency first, then compare what the user typed in to your calibrated pe...

más de 4 años hace | 0

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help me understand accumarray
OK, so the subs matrix represent the rows and columns of the matrix A. (1, 1) represent the first row and first column. (3, 2) r...

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how to set limits of integration (for example: 0:inf) for a vector using trapz tool ?
Your vector of frequencies is not correct, because fft returns the negative frequencies first, followed by the positive frequenc...

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how to produce multtiple stacked plots with different colors in a for loop?
You can use the power of colormaps (link) to do this. Here is an example: t = 0:0.001:1; figure col = jet(60); for k = 1:60 ...

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Zooming a portion of figure in a figure
I just made some minor adjustments close all L = 0.01; R = 0.1; K_i = 800; K_p = [0.8, 1.2, 2, 4, 10, 40, 100]; figure...

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Find duplicate entries and average them
% original data x = [0, 10, 20, 20, 20, 30, 40, 50, 50, 70]; y = [0, 10, 10, 20, 20, 30, 40, 50, 60, 60]; z = [10, 20, 40...

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How to plot like the inserted picture?
You need to first collect all your values for yticks and labels, then set them all at once. For example nfiles = 10; for a = 1...

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Time-frequency spectral coherence analysis
Have you looked at the MATLAB function mscohere? Otherwise, you could try looking into this function in the spm12 toolbox: spm_...

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i made a program that runs with the sound program but no sound comes out
The file is handel without a capital letter H. Same for gong. You can check the others. Once you load the file you have to play ...

más de 4 años hace | 0