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FFT analysis with window of vibration during milling
The signals have broadband noise, so any sort of frequency-selective filter will not adequately eliminate it. There are two way...

mehr als 3 Jahre vor | 1

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plot specific frequency of signal
Are you certain that 500 Hz is the correct sampling frequency for this trace? That would calculate to a heart rate of 335 bpm...

mehr als 3 Jahre vor | 0

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Plot 3D Surface with 4D Colour - Can not Create Surface, only Data Points
The surface function allows the apploication of a specific color matrix to a surface plot. (The surf function does not.) Tr...

mehr als 3 Jahre vor | 0

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Logical Indexing With LinSpace Issues
format long X = linspace(0.2,3,29) %Creates an array going from 0.2 -> 3 via steps of 0.1. So 1.3 is in it. disp(X(12)) fl...

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Shaded error area of Std Dev.
It would of course help to have your data. However this call: std_y = std(P_all,0,2); implies to me that your data are col...

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z=f(x,y) and w=f(x,y). I am trying to reverse the table to get x=f(z,w) and y=f(z,w).
Apparently, X, Y, Z and W are all equal-sized matrices. Assuming that there is essentially a one-to-one correspondence between ...

mehr als 3 Jahre vor | 0

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Plot data in matlab
Isn’t that just this — Scaled = @(data,Th) [data(:) ones(size(data(:)))] * ([Th 1; 0 1] \ [1; 0]); % Scale Data By Thresho...

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I have a problem in the annexed excel file there are two tables, first table give the graph representing geological layers I need to get the second table with Matlab Code
One approach — C1 = readcell('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1315950/Salt%20Dome%20Interpretat...

mehr als 3 Jahre vor | 0

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Hi , all there , i have an excel file that i want to split it by special element value in the file to some files . how can i make it possoble with matlab
To begin a new sub-array whenever a zero appears in any row, this works — M = randi([0 20], 15, 4) ZeroInRow = any(M==0,2); ...

mehr als 3 Jahre vor | 0

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How to find troughs of a signal below a threshold
Use the 'MinPeakHeight' name-value pair — t = linspace(0, 2*pi, 500); s = sin(2*pi*t) - sin(2*pi*0.1*t-0.45); Threshold ...

mehr als 3 Jahre vor | 1

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How do I fill colour on both sides of the sin wave in this graph?
Using the patch function — % Define the time axis (x-axis) t = linspace(0, 12, 1000); % Define the parameters of the sinusoi...

mehr als 3 Jahre vor | 0

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code is right but can not the a plot
You need to redefine ‘t’ so that it matches the row size of ‘u’: t = linspace(0, 2.5, size(u,1)); Try this — % clear % cl...

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Plot several time series data stacked in one graph
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1314900/Data.xlsx') VN = T1.Propert...

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Data normalization with threshold
I am not certain what you want to do. Perhaps one of these — data = [10,30,50,75]; threshold_value = [70]; Result = no...

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How to save the scatter plot with and without transparency
The gca function (of course) is ‘get current axes’, and it does exactly that. One option is to save an axes reference in each s...

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Undefined function 'geomean' for input arguments of type 'double' in Matlab 2020
An alternative is: gm = @(x) prod(x)^(1/numel(x)); x = rand(1,100); y1 = geomean(x) y2 = gm(x) .

mehr als 3 Jahre vor | 2

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Extracting specific data from time range excel
It would help to have the Excel file. The ‘1 data raeading per hour’ request is open to intpretation. First, convert the t...

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Normalize the amplitude of a sinewave of varying amplitude and frequency
‘I need to determine each "cycle" by detecting zero crossings and the peaks and valleys, then determining the peak and vally for...

mehr als 3 Jahre vor | 0

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How can I remove a pulse from a soundwave?
If the pulse is at a single frequency with known bandwidth, just use a bandstop filter. If there is energy at several frequenci...

mehr als 3 Jahre vor | 2

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Don't know how to fix error preallocating for speed
It’s likely not an error, simply a suggestion that preallocating for speed would be advisable. (A preallocated loop generally r...

mehr als 3 Jahre vor | 0

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How to create for loop
You need to convert the numeric vectors into polynomials in before taking the inverse Laplace transform of them. Even then, th...

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Detecting peaks and valleys in signal
I do not have your data. See if the 'MinPeakDistance' name-value pair will help to isolate them. Experiment with it to ignor...

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How to separate time series data?
It depends how they are formatted. Assuming the times are a datetime array — t = datetime(1,1,1) + seconds(0:0.5:15).'; s ...

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Need to create a table with values from a bode plot
One approach would be to use the freqresp function with, for example: w = [1; 10; 100]; then calculate the magnitude and phase...

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Z must be a matrix, not a scalar or vector.
It would be helpful to have the actual data rather than a ‘proxy problem’. The ‘Z’ vector should have the dame number of elemen...

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adding cells of two arrays
Perhaps something like this — A = {[10,9,13,21,18] [9,9,11,18,18]}; B = {[11,10,12,20,19] [10,9,13,21,18]}; C = cellfun(@(...

mehr als 3 Jahre vor | 1

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Reconstruction of a Signal from the Real Part of Its Discrete Fourier Transform for matlab
No. You will need the complex part (or equivalently, the phase information) to accurately reconstruct the signal. Otherwise,...

mehr als 3 Jahre vor | 0

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extracting unique numbers from a cell array
One approach — G{1} = [1]; G{2} = [1]; G{3} = [2,3,4]; G{4} = [4,5]; Len2 = cellfun(@(x)numel(x)>=2, G) Gu = unique([G{...

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fmincon and choosing different initial values
The Global Optimization Toolbox has a number of functions that can search the parameter space for different initial parameter es...

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In this code, I want to find out slope at every value of x?
Try something like this — x=[10.33 10.331 10.332 10.333 10.334 10.335 10.336 10.337 10.338 10.339 10.34 10.341 10.342 10.343 1...

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