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Using for loops to subplot
One approach — x = linspace (1,3600,3600); y = randn(3600, 25); figure for k = 1:size(y,2) subplot(5, 5, k) plo...

mehr als 3 Jahre vor | 0

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Estimating a transfer function with a given Bode csv data file
Thje input is preferred, however not required. See: iddata, idfrd and related functions, and go from there.

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how to smooth or filter the signal like this?
I saved that code. I did not save the non-code text that went with it. I am not certain that I can reproduce the image that ...

mehr als 3 Jahre vor | 0

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Extract signal values from a data file
I am not certain what ‘identify and match’ means. It is certainly possible to filter the 40 and 75 Hz frequencies individually,...

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Obtain the desired orientation without reversing the direction of the two axes
Try something like this — data = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1236147/data.txt')...

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How do you do a sine transform in Matlab?
In general, a Fourier transform is defined as: where: and its inverse: since apparently is in Hz (or at least not a...

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How can convert line plot to bar plot
I have no idea what you want to do. Perhaps something like this — nodeSize=[50 100]; x = rand(3,2); figure hb = bar(x,...

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How to determine and adjust the x axis after taking the 1D FFT?
I usually do something like this — t = linspace(0, 100, 10000); % Time Vector s = sum(sin([1...

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how to resume GA with saved output in script file
For future reference, consider the approach in How to save data from Genetic Algorithm in case MATLAB crashes? - MATLAB Answers ...

mehr als 3 Jahre vor | 0

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How to Determine the Cutoff Frequency of Butterworth Low-Pass Filter When Filtering an EMG Signal ?
Use the fft or pspectrum functions to calculate the Fourier transform of the EMG data. Use that result to define the frequencie...

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How to determine phase angle of an AC voltage?
Note that ‘v’ is a function of two variables, ‘w’ (that I assume is radian frequency) and ‘t’ (obviously time). The result is a...

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How do I use MatLab to find a line of best fit with a predetermined y intercept using regression.
Perhaps — x = 0:250; y = randn(size(x)); B0 = x(:) \ (y(:)-1) fitline = x(:) * B0 + 1; figure plot(x, y, '.') hold o...

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The cutoff frequencies must be within the interval of (0,1).
‘The cutoff frequencies must be within the interval of (0,1).’ Divide ‘fp’ and ‘fs’ by the Nyquist frequency ‘fn’, one-half the...

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How a bandpass filter (BP) can be made
Since you apparently are supposed to code it using command-line function calls in a script, and you are limited to an order 5 fi...

mehr als 3 Jahre vor | 1

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first order differential equation
One approach — syms y(x) x Y Dy = diff(y); Eqn = 2*x*y*Dy+(1+x)*y^2 == exp(x); [VF,Subs] = odeToVectorField(Eqn) odefcn =...

mehr als 3 Jahre vor | 0

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remove noise from signal
Change: [b,a] = butter(n,Wn); to: [z,p,k] = butter(n,Wn); and eliminate the tf2zp call. Then the filtfilt call should be...

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How to plot u(t) - u(t-2) on matlab
If ‘u(t)’ is the unit step (heaviside) function — syms t u(t) = heaviside(t); figure fplot(u(t)-u(t-2), [0 5]) grid xl...

mehr als 3 Jahre vor | 1

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Optimisation of parameters in coupled ODE
I’m not certain what you’re doing (and 81 parameters seems excessive), however this is the approach I use with ga to solve kinet...

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str2double function multiplies values by 10e12, 10e13 and 10e14 randomly.
Try ssomething like this — data1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1233477/example...

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Setting length of output vector for ode45
Choose a vector with more than two elements for ‘tspan’ for example — tspan = linspace(min(time), max(time), N); where ‘time’...

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Fix the code calculate PSD
I am not certain what you are doing. The third argument to cpsd is supposed to be a window function, however in your calls to i...

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how to use dataaspectratio in scatterplot?
I doubt that daspect is going to have any effect here. The only option is likely to translate one of the plots by subtracting t...

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How to compute number of bit change among consecutive binary numbers?
Use pdist with the 'hamming' distance metric then squareform to create the matrix — b = {'110' '101' '011' '111' '...

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Symbolic Toolbox Solving for Zeros
One approach — range = [-5 5]; syms x; f(x) = sin(3*x); z = dPlotInfo(f, range); disp(z); function [zeros] = dPlotInfo(...

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How do I right pad a numeric data field with invisible characters?
It would help to know more precisely what you want to do. Numeric format dexcriptors can be created as a total numeric field ...

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Differentiation question - How to find out H vs. dH/dt from a list of height and datetime series?
One approach — T = ['01-Jan-2003' '17-Jan-2003' '03-Feb-2003' '20-Feb-2003' '01-Mar-2003' '15-Mar-2003' '04-Apr-2003' '...

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Bode plot, plotted with experimental data
If you want to identify a system from experimental data, use the System Identification Toolbox functions, starting with iddata, ...

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How can I delete last two colum in a matrix?
Try something like this — A = rand(7,5) Anew = A(:,1:end-2) .

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how to extract y as a function of x
Try something like this — syms x y a b x0 y0 tr sympref('AbbreviateOutput',false); Eqn = (a^2*sin(tr)^2+b^2*cos(tr)^2)*(x-x0...

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How to invoke and use GA tool in Matlab R2022b?
If you are doing parameter estimation, this approach will likely work — x = 1:0.1:10; y = 2.5*exp(-(x-5).^2/2)+randn(size(x))...

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