Answered
Calculate convolution of two given continuous signals in matlab
Closed form solution using symbolic math syms t tau real f1(t) = rectangularPulse(-5,5,t); f2(t) = exp(-t)*heaviside(t); y1(...

4 years ago | 1

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Answered
Why does MATLAB (Symbolic Math Toolbox) not integrate this simple function.
syms x a real I = int(simplify((1-x^2/a^2)^(3/2)),x,-a,a)

4 years ago | 0

Answered
Behavior of isPassive and hinfnorm.
Hi Siva, I'm not able to load the .mat file, so can't really look at the problem. load('https://www.mathworks.com/matlabcentra...

4 years ago | 1

Answered
Question on use of fft and using positive frequency values only
Is this just an indexing question? If I understand the code snippet correctly, the frequency vector starts at 0, and incremente...

4 years ago | 0

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Answered
How do I solve a symbolic system for a certain vector?
Hi Vitor, To make sure I understand the question, it assumes that a rigid body can have a constant, non-zero angular velocity v...

4 years ago | 1

Answered
Adding a delay in state space form
The command sys=ss(A,B,C,D,'InputDelay',theta,'OutputDelay',0); puts a delay on the input signal, i.e., at the output of the a...

4 years ago | 0

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Answered
DFT amplitude differs from CFT amplitude
Hi An, A couple of issues with the code, addressed below. T_ech = 5E-5; y = [0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0]; t = [T_ec...

4 years ago | 0

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Answered
Step response and Impulse response of IIR filter
Hi Alex, It would be helpful to know the value of temp. Absent that, it seem like [hstep,tstep] = stepz(sos); hstep = hstep*...

4 years ago | 0

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Answered
Incorrect Integrator Behaviour Simulink
It looks like the input sine wave is sin(2*pi/2*t) = sin(pi*t) The output of the integrator should be -1/pi*cos(pi*t) + C B...

4 years ago | 1

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Answered
Change the size of a log in simulink
Double click the ToWorkspace block and increase the Decimation parameter. If you really need all of the data, maybe something m...

4 years ago | 0

Answered
Designing an Observer - Control System
I don't think you're going wrong anywhere (though you might want use size(Aa,1) instead of length(Ca) in a few places). I think ...

4 years ago | 0

Answered
Plot a 2D Gaussian prior
Something like this? mu = [1 1]; Sigma = [1 .7*1*sqrt(2); .7*1*sqrt(2) 2]; [X,Y] = meshgrid(-2:.1:4); p = mvnpdf([X(:) Y(:)]...

4 years ago | 0

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Question

Is exp() a Documented Function in the Symbolic Math Toolbox?
I can't find it.

4 years ago | 3 answers | 0

3

answers

Answered
adding a communication delay in simulink
Try using the LTI System block.

4 years ago | 0

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Answered
Calculate convolution of two given continuous signals in matlab
Assuming a closed form solution is desired this problem can be solved with the Symbolic Math Toolbox syms rectangularPulse in...

4 years ago | 2

Answered
Why do the eul2quat and quaternion functions differ on the calculated results?
Hi cui, I think that both eul2quat and quaternion('frame') are using, right-handed, intrinsic rotations and the sequence of rot...

4 years ago | 1

Answered
roots(x) vs root= interp1(y,x,0)
The query points in x are spaced too far apart for the linear interpolation used by interp1 to be accurate relative to the actua...

4 years ago | 0

Answered
Fourier transform of a rectangular pulse
Hi Luke, Your original code was o.k. except for plotting against t. It is typically plotted against an array of frequencies. Al...

4 years ago | 1

Answered
Calculation of Phase margin
Hi T, it's a tricky problem becase of the shape of the gain curve around the phase cross over frequency. w=1.4910; k=sqrt((w^4...

4 years ago | 0

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Answered
Find the impulse response
Hi Marina, Sometimes the Symbolic Math Toolbox works in mysterious ways and it is difficult to manipulate expressions into simp...

4 years ago | 1

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Answered
Function 'odeToVectorField' introduces undesired 'free' variable
By default, the Symbolic Toolbos assumes all variables are complex. So using the ' operator, which is the complex transpose oper...

4 years ago | 2

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Answered
Within a script, can I close or redirect a Windows File Explorer window opened with 'winopen'?
Maybe using an actxserver is a viable approach. I've used it for interacting with Power Point. It's not so bad once you get the...

4 years ago | 0

Answered
How can I remove this error?
Either: a) double click on the Audio Device Writer block and uncheck the box for Inherit Sample Rate from Input and set the des...

4 years ago | 0

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Answered
I'm not sure if a user defined MATLAB function is executing or not in Simulink.
Consider replacing the threshold crossing detection functionality in spike_checker with a self resetting integrator. Feed the s...

4 years ago | 0

Answered
Different results when compearing DFT from fft to the "real" fourier transformation
Hi Lillebror, Referring only to the code in the original question, it looks like there is a mix up between the variables used t...

4 years ago | 1

Answered
What frustrates you about MATLAB? #2
It would be nice if I could open a file in the editor as read-only, click somewhere to set the editor for read only after a file...

4 years ago | 0

Answered
Most effective way to solve nonhomogeneous linear ODE problem
Hello Michal, Following up on this comment, I'd be concerned about the solution of the "reference" method if that's what's bein...

4 years ago | 1

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Answered
Discrete Transfer Function Truncating Signal?
If the sample time of the DTF block is 0.3, and the simulation runs for 20.1 - 20.39999999 seconds, there should be 20.1/0.3 = 6...

4 years ago | 0

Answered
Simplify Transfer Function Matrix from State Space Form
Hi Diego, It looks like the code used the Symbolic Math Toolbox? If so, there's no need to go that route unless you really nee...

4 years ago | 0

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Answered
nufft wrong result ?
Hello Kraka, Have you tried setting up your query points to exactly include f = 0.025? Also, it wasn't clear why the plot comma...

4 years ago | 0

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