Paul

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Answered
how to get the current model design in matlab?
Hi Atul, After a block is added to a Simulink diagram one can use bdroot(element) to get the name of the model in which the ele...

2 dagar ago | 0

Answered
Using interpolant surface in Simulink
I think the fundamental problem is that objects of class sfit are not eligible for code generation, and so cannot be used inside...

2 dagar ago | 1

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Answered
Spectral radius of 4×4 matrices
Hi Sunday, The code runs without error (after defining h) here on Answers using 2024b. You're seeing a different result in 2021...

5 dagar ago | 2

| accepted

Answered
Icare doesnt have the answer
Hi jowii, % Input Parameter a_11 = -0.0857343575298716; a_12 = -4.83449522782224; a_21 = 0.000139892812156308; a_22 = -0.10...

5 dagar ago | 0

Answered
H1 H2 Hv estimators all the same
Hi Riccardo, I'm only marginally familiar with the H1/H2 methods of estimation. Keeping that in mind ... load data.mat force ...

12 dagar ago | 0

Answered
Help using logic to edit table
T = table(["H";"L";"H";"L"],(1:4).','VariableNames',["Tide","Height"]) Thigh = T(T.Tide=="H",:) Tlow = T(T.Tide=="L",:) Or, i...

14 dagar ago | 0

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Question

Does Symbolic int() Always Return Justifiable Results When the Integrand Includes a kroneckerDelta?
Integrating the kroneckerDelta sounds a bit weird, but it it it's allowe it should be consistent. Define the Kronecker Delta an...

14 dagar ago | 0 answers | 0

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answers

Answered
Inverse Fourier transform of unilateral exponential function - ifourier MATLAB
syms t f a = sym('a','positive'); Y(f) = 1/(a + pi*f*2i) The default parameters in sympref assume that the transfomr variable...

16 dagar ago | 0

Answered
pole placement controller gain trouble with identified receptance
Hi GIOVANNI, I don't understand what the math is trying to do or how f and g will be used, so this answer may be limited in sco...

17 dagar ago | 0

Answered
Issue with Laplace Transform for Exponential Functions in MATLAB
Hi FFU, Let's take a look at these one by one. syms t real f1 = 2^(-t); I've never seen a Laplace transform table that inclu...

20 dagar ago | 0

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Answered
Magnitude Plot Incorrect Frequency
Recheck the conversion from rad/sec to Hz in the plot command for the magnitude of the spectrum

23 dagar ago | 1

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Question

Why Doesn't doc Show Links to Other Uses of the Same Function?
Using 2024a with local documentation .... I just realized that when I open a doc page for a function that I no longer get the b...

23 dagar ago | 0 answers | 0

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answers

Answered
Plotting Resistance vs Frequency Response
Looks like the model also need an Input Perturbation to define the input to the transfer function. Should be on the same menu as...

24 dagar ago | 0

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Answered
Filter cascade with raised cosine filter and half-band filter
Fs = 20e3; Fp = 15e3; rc = rcosdesign(0.35, 5, 2, 'sqrt'); Fs2 = 4*Fs; % Sample rate Fp2 = Fp; % Passband edge Fh2 = ...

25 dagar ago | 0

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Answered
vpasolve finds no solutions except the null solution
This code exceeds the run time limit here, and is taking forever running on my computer, so don't know what it produces. If sol...

28 dagar ago | 2

Answered
Subtraction of two symbolic matrices gives error "Array sizes must match" when the sizes are the same
Hi Jacob, Start of code rng(3) L=randi([1 10],3,3,4,4); N=randi([1 10],3,4); syms xvec [4,1] real syms xmat [4,4] real og...

28 dagar ago | 1

Answered
c2d Tustin not matching analytical method
Hi Alborz, %% Filter Specs Ts = 0.01; zeta = 1; wn_rps = 30 *2*pi; %% C2D (tustin) s = tf('s'); tf_cont = wn_rps^2 / (s...

28 dagar ago | 0

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Answered
Modify function_handle in Simulink matlab function
Assuming the ultimate goal is to have nonConOption as an input to the MatlabFunction block, I got this to work in the MatlabFunc...

29 dagar ago | 0

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Answered
How can I import variables from a Simulink Model Workspace to my MATLAB workspace?
Hi Hansi, Use get_param to create a handle the model workspace, and then loop over the variables in the model workspace and ass...

ungefär en månad ago | 0

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Answered
Inverse fourier transfer of cos function with time shift
Hi Matt, Keep in mind that you are inherently dealing with a windowed cosine, x1(t) = cos(4*pi*t)*w(t), where w(t) = 1 for 0 <=...

ungefär en månad ago | 0

Answered
Simulink Matlabfunction does not support Global Optimization toolbox
The MatlabFunction block always generates code, even in Normal mode. One option that may be workable is to implement your optim...

ungefär en månad ago | 1

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Answered
Switch Block: Can we disable Integer Round off option
Saturation block might be useful ...

ungefär en månad ago | 0

Answered
One zero is missing in the result of c2d function uses 'matche'
sysc = tf(11,[1,1,0]) sysd=c2d(sysc,.1,'matched'); zpk(sysd) Is the addtional zero in the textbook also at z = -1?

ungefär en månad ago | 0

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Answered
My Step Response plot from Matlab does not match the one from Simulink
Hi Javier, You might want to investigate the step size control options in Simulink. The plot looks a bit jagged, which suggests...

ungefär en månad ago | 0

Answered
Stability Margins for MIMO Feedback Loop
Load in the data load linsys format short e The open loop system has a pole just to the right of the real axis. Maybe this is...

ungefär en månad ago | 0

Answered
can anyone explain the difference between fft and freqz commands?
freqz is a general purpose function for computing the frequency response of a discrete-time filter. The filter can have an infin...

ungefär en månad ago | 0

Question

Incorrect Substitution with subs() from Workspace Variables?
syms alpha s H t system = 1/(s + 1/alpha); y = ilaplace(1/s * (1-exp(-s*H)) * system) Define specific values for alpha and H ...

ungefär en månad ago | 1 answer | 0

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answer

Answered
IFFT results in wrong frequency
The inverse Discrete Fourier Transform, as implemented by ifft, maps a signal from discrete frequency to discrete time. Each ele...

ungefär en månad ago | 0

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Answered
How can I use the function coeffs() as the input to the function tf()?
Unless there are reasons to use syms other then to compute the polynomials, it's probably better and easier to avoid syms altoge...

ungefär en månad ago | 0

Answered
Array of transfer function (nxn) when multplied with an array of constant nx1 give issue
Example matrices rng(100); A = rand(3); M = rand(3,1); s = tf('s'); T = inv(s*eye(3)-A) H = T*M Your are correct that each...

ungefär en månad ago | 1

| accepted