Answered
How does simulink use data stored in matlab as an array for each time iteration?
Hi M.I, 141 rows does not correspond to 15 sec with 0.1 step size. Perhaps it's just 14 seconds. Whether or not you need to us...

3 years ago | 0

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Answered
Surprising behavior in randsample
I don't see anything in the doc that says anything about the ordering. randsample is an .m file. The algorithm for without repla...

3 years ago | 1

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Answered
How make a high pass filter and give input to it simultaneously?
"How can i make a filter which can have a given cutoff frequency and also passes a custom made input (in the code)." Check out ...

3 years ago | 0

Answered
Rename integration variable in symbolic result
I don't know if I'd call this 'easily', but it gets the desired result (I believe). syms t m b y(t) y0 C x(t) % definitions of ...

3 years ago | 0

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Answered
Matlab - Bode plot of discrete and continuous Function
One problem is that the discretization of the product is not the product of the discretization. But with T_sample so small, tha...

3 years ago | 0

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Answered
I have a time domain signal.I want to calculate energy of my signal......
Suppose we have a continuous-time signal syms t f x(t) = exp(-abs(t/5))*sin(2*sym(pi)*2*t) This signal is noncausal and has i...

3 years ago | 0

Answered
Discrete Average on Simulink
If I understand the question correctly ..... Use a Discrete FIR Filter block to maintain a running average of 600 samples. Set ...

3 years ago | 0

Answered
InitFcn Error at Simulink
The model (likely) needs information stored in a file called bldcData.mat in order to execute, so the InitFcn callback tries to ...

3 years ago | 0

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How to plot the continuous convolution result
Hi YAMENG, Have you considered computing the convolution integrals directly? Note scaling to get them all to fit on the same ...

3 years ago | 0

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Answered
Determine the Length of One Oscillation
I think this problem is supposed to be attacked like this. Define H(z) syms z H(z) = (-3*z^2 + 4*z)/(8*z^3 - 14*z^2 + 8*z - 2...

3 years ago | 1

Question

Figure Control Buttons Out of Sync in Live Script
I'm running a live script. When I hover the mouse in the figure I the home, zoom out, zoom in, pan, and save buttons become vis...

3 years ago | 1 answer | 0

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Can I use a symbol as a variable?
Hi Prasenjit, Yes, you can do that syms m f = m^2 % expression that contains m as a symbol whos m % m is sym for m = 1...

3 years ago | 0

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How to plot frequency spectrum of a piecewise function in matlab?
Hi Daniel, Regarding this comment, the use of fftshift and the multiplication by dt both have to do with using the Discrete Fou...

3 years ago | 0

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Answered
I want to find the filtered signal and remove the noise from the discrete received signal from the radar and convirte it to continuos
c2d (Control System Toolbox) or c2d (System Identification Toolbox) requires the first input be a dynamic system model. As far a...

3 years ago | 1

Answered
I have an error when simulate a linear delay system with sliding mode control
Hi yousra, I'm not quite sure what the code is trying to do. However, the reason for the lsim error is pretty clear, and there'...

3 years ago | 0

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Answered
How can I use the matlab function like fcn block
Hi titor7, The reason for the error in the original model show in this comment is because Simulink didn't have enough informati...

3 years ago | 1

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Can't susbsitute a variable that is defined
Do syms C1 before calling subs. syms y(t) a eqn = diff(y,t) == a*y; S = dsolve(eqn) syms C1 subs(S,C1,2)

3 years ago | 2

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Answered
Running simulink model with multiple values of a parameter, and then plotting multiple results on the same plot
Instead of, or in addtion to, the scope, send your data to a To Workspace block. Check out this doc page for an example of how ...

3 years ago | 0

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Answered
Why does the step response to my discrete system not match between MATLAB and Simulink?
The explanation for the Simulink resutls is that the coefficients entered in the Discrete Transfer Function block don't represen...

3 years ago | 0

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How to get state-space from a transfer funciton matrix
Don't use tf2ss. Check out ss instead to get started.

3 years ago | 0

Answered
linearize a non linear system
Normally, linearize is used to linearize a Simulink model. However, you may be interested in this Question first.

3 years ago | 0

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Not simplifying to a usable answer
Hi Andrew, The answer key for Z1 appears to be incorrect. Also, I don't follow the equations you posted in the question. Anyw...

3 years ago | 0

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Answered
Discrete input to continuous transfer function
Hi Luca, I'm 99.99% sure that the output of a block with a Discrete Sample Time is held constant until it changes. I know that...

3 years ago | 0

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Answered
Output of a transfer function with input
The HeavisideAtOrigin should be 1 when using lsim M=2; b=14; q=20; num=[1]; G=tf(num,[M b q]); syms t F = 2*(heaviside(...

3 years ago | 1

Question

Should this Symbolic Limit be Zero?
syms x a % complex by default syms n integer assume(abs(a)>abs(x)); assumptions limit(x^n/a^n,n,inf) Should that limit be z...

3 years ago | 1 answer | 0

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Question

Can Symbolic Assumptions be Combined or Simplified?
Suppose I have a variable syms z and assumptions assumeAlso(abs(z) > 1); assumeAlso(abs(z) > 2); assumptions The only valu...

3 years ago | 0 answers | 0

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Answered
Integral from 0 to inf with imaginary numbers takes too long
Hi BOSHU Here is my attempt. syms Kt Ks Cs M m to % overwritten later syms x Assume t is real, is that a good assumption? ...

3 years ago | 1

Answered
How to make a simple plot with two lines?
Hi Macy, %table_a = readtable('Data1.xlsx'); table_a = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_fil...

3 years ago | 0

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Answered
A matrix is passed into Simulink fromworkspace,Invalid workspace variable specified as workspace input in 'test03/From Workspace1'. Time values must be non-decreasing.
If img is a contstant matrix, don't use a From Workspace block. Instead, use a Constant block and set its 'Constant value' bloc...

3 years ago | 2

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Answered
im trying to Find ∂z∂u when u=0, v=3, if z=sin(xy)+xsin(y), x=2u2+v2, and y=3uv.
Hi Matthew, Repeating the code from your comment clear; syms u v x y z ; %partial z z =sin(x*y)+(x*sin(y)); dzdx=diff(z,x)...

3 years ago | 0