Operations and differentiation with symmatrix in MATLAB... possible bug?
Hi dominik, I'm not sure what Problem 1 is refering to. I think Problem 2 can be explained as follows: clear all n = 2; A =...

ungefär en månad ago | 0

Dynamically Make a Variable Name
Hi Summer, One option would be to use load with an output argument, which will put all of the variables the .mat file in a stru...

ungefär 2 månader ago | 1

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How to integrate acceleration into displacement data correctly?
The integration seems correct based on the implied initial conditions. Fs = 1000; % sampling freq. Ts = 1 / Fs; % sampling per...

ungefär 2 månader ago | 0

Expansion in a Fourier Series
% Problem_1 the Fourier series of the function f(x) % f(x)=0 -pi < x < 0 % f(x)=1 0 < x < pi %syms x n pi % pi=3.14; ...

ungefär 2 månader ago | 0

Plot Specific Points on Nichols Chart
Hi Amaan, The input to nichols has to be an a dynamic system model. So either you have to convert AbsN and AngN to such a mode...

ungefär 2 månader ago | 0

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Question

Anyone else having trouble running code on Answers? I see it trying to run with 2024a, but get a message "Something went wrong....

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Calculating a Fourier series with MATLAB manually problem
I don't think anything is wrong with the code in the Question, at least based on visual inspection (though it's always best to u...

ungefär 2 månader ago | 0

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Fourier Series Curve Fitting and giving its coefficient with respect to eqaution
Hi OLuxanna, The code is attempting to implement the complex exponential Fourier series using the C_n coefficients. Let's look...

ungefär 2 månader ago | 0

How can I use allmargin() with non-unity feedback?
Hi Erik, What's the loop transfer function, L(s), from which one could compute the stability margins (having already determined...

ungefär 2 månader ago | 1

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How to use exp^s for a transfer function in matlab
Models with internal delays are implemented in state space form. Ts = 1/2000; s = tf('s'); Gd = exp(-1.5*s*Ts); With Gd on...

Is there a way to compute the n-th symbolic derivative of a function where n is also symbolic?
Hi Matt, I don't think so, at least not using diff syms f(x) x syms n positive real integer % Define the function for which...

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gridureal samples does not match the sampled system.
Hi Mohammad, I confess that I can't explain how dss is implementing this uncertain, descriptor system. I'm particularly curious...

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cosd() giving similar value for different angles
data = load('LatLong.txt'); speed_km = data(:, 1); latitude = data(:, 2); longitude = data(:, 3); The latitude is quite s...

Understanding FFT in MATLAB
Hi Janee, Speaking only to the Matlab side of this question, why would it expected that the rows of u1 and up be the same? Each...

Typo in the nufft (R2024a) documentation?
Hi Ana, Yes, either the plot command was intended for X or the ylabel is wrong. In the context of that example, I suspect they ...

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Question

How Does mldivide Work for Full, Square, Full Rank, Triangular Matrix?
How does mldivide work when the input matrix A is full, square, full rank, and triangular? The doc page just say it uses a trian...

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Plot Piecewise function graph
This line y(i) = 1./log(2)*sin(x(i)); is incorrect. The order of operations for multiplication and division is that they ar...

How to use parameter callback to parameterize mask workspace?
What happens if you just enter T = 1/f; in the Initialization section and leave the f_callback blank, or delete it altogether?...

Inverse of a symmetric matrix consisting of submatrices is desired.
I wasn't going to post this as it didn't seem like a useful answer, but, since @Torsten raised the idea of using the block matri...

Assumptions are not being considered in symbolic math.
Hi Nick The issue is that the code is using linsolve, which doesn't know anything about the assumptions on the m_i. Generate a...

piecewise function Fourier seriers
Hi KUN, In the context of the Fourier transform, I'm not sure that the assumption on t makes sense, at least not in the context...

want to differentiate 1+c*exp(t)/1-exp(t) which is 2*c*exp(t)/(1-exp(t))^2 and then return it to it's original form by integration using int(), understand rewrite(tanh,"exp")
Hi Joseph, I think you got the correct result, though not using what might be considered best practices syms f c t y(t) y ypri...

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Problem with using mussv
Hi Ofek, N = 30; w_vec = logspace(-5,5,100); "I calculate it using the function freqresp and the resulting array has dimensio...

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Question

What Does the Symbolic Math Toolbox Mean by 0 < s When s is Complex?
syms s syms t real f = int(exp(-s*t),t,-inf,0) What does that first condition mean insofar as s is complex?

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Question

Does the Symbolic Toolbox Support 0- and 0+ ?
syms s syms t real f = int(exp(-s*t),t,-inf,0) Is the second term in the second condition a notation for (though I'm not e...

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Adjusting a Sawtooth Graph and getting spectrum
Do you want a triangle or a sawtooth? Assuming the former as stated in the question, use tripuls %T = 10*50; fs = 2000; t = ...

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how to find Laplace transform of u(-t) in MATLAB?
Hi Sundaram, The function laplace implements the unilateral Laplace transform for causal signals. However, heaviside(-t) is no...

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How can a Simulink State Space block state be periodically reset?
i think you'll have to use an Integrator and other native blocks to implement xdot = A*x + B*u y = C*x + D*u Use the external...