Beantwortet
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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Beantwortet
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...

mehr als 2 Jahre vor | 0

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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...

mehr als 2 Jahre vor | 0

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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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Frage

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...

mehr als 2 Jahre vor | 0 Antworten | 0

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Beantwortet
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...

mehr als 2 Jahre vor | 0

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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?...

mehr als 2 Jahre vor | 0

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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...

mehr als 2 Jahre vor | 0

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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...

mehr als 2 Jahre vor | 0

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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...

mehr als 2 Jahre vor | 0

Beantwortet
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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Beantwortet
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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Frage

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?

mehr als 2 Jahre vor | 1 Antwort | 0

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Antwort

Frage

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...

mehr als 2 Jahre vor | 1 Antwort | 0

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Beantwortet
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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Beantwortet
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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Beantwortet
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...

mehr als 2 Jahre vor | 0

Beantwortet
modred() Scaled Output
Hi Sam, I can't explain why TMW chose to change the behavior of modred. Having said that, I have some observations about your ...

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How to get 2% and 5% settling time from simulink?
Hi Daniel, I'm interpreting your question to mean that you have a Simulink model of the system and in Simulink you stimulate th...

mehr als 2 Jahre vor | 0

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Zero-order hold practical differentiator offsets magnitude
Hi Greg, I don't know if this will be the complete explanation your looking for, but here goes .... Define the continuous-time...

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Symbolic integration has 3 solutions based on integration variable range, how to extract one of these?
syms U_0 r Radius mom_2 = int((U_0*(1-r/Radius)^(1/7))^2*2*sym(pi)*r,r,0,Radius) One approach that just extracts the case you ...

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Beantwortet
How to set the sample time of a discrete transfer function block to 0.005? Please tell
Hi ISHITA, TMW recommends leaving the sample time of that block as inherited. Instead, control the sample time of the signal th...

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Beantwortet
Discrete-time Simulink not matching Matlab Connect()
Hi John, Check this comment for an example that shows the same open loop system obtained from the combination of connect and ge...

mehr als 2 Jahre vor | 0

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Do source blocks in Simulink have an implicit unit step function built into them?
For the top path: Y(s) = s/(s+1)*X(s) = 1/(s+1) * (s*X(s)) The differentation rule for the one-sided Laplace transform is: L(...

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Beantwortet
Find the 3D components-based row of an array that most closely matchs a given vector
I think the specific solution would depend on the figure of merit for defining "closeness" of two vectors. For example, if the ...

mehr als 2 Jahre vor | 0

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Why are subsystems highlighted in different color after simulation
Hi Neelabh, It looks like it might be due to Sample Time Colors. Go to Debug -> Information Overlays and see if the Sample Time...

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Beantwortet
Execute Matlab function in Simulink
You are correct. In Matlab, the code looks like this (actually making the call to moving_average2) t = 0:0.1:10; u = sin(t); ...

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why am i getting the error "Incorrect number or types of inputs or outputs for function step."
Hi Salim Your code runs fine here. What version of Matlab are you using? I just changed the code to make separate plots intead...

mehr als 2 Jahre vor | 0

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ifft convert frequency domain to time domain
Hi Angie, The input to ifft should cover all frequencies from 0 to Fs - df, where df is the frequency step. In this case, max(f...

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