Respondida
How to change from scientific form to decimal form using continuous and discrete transfer functions?
Hi Edward, It would be immensely helpful to show a simple example with an actual result and explain what the preferred result w...

alrededor de 4 años hace | 1

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Respondida
Convert sym to double
Hi @Mark, The first problem with the code is in this area W=zeros(1,len); for i=1:len m=mn{f}(i) W(...

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Respondida
Function solve cannot find explicit solution with 'ReturnConditions'=true but it finds when it is false
Verifying same behavior in 2022a syms t2 t a b ab at bt a2 b2 N x T T0 k assume(N ~= 0 & T ~= 0 & k ~= 0) eq1 = ab == a2*x + ...

alrededor de 4 años hace | 0

Respondida
simplify function does not work properly
Consider a simpler case syms x y term1 = x - 1; term2 = y - 2; eq = term1*term2 assume(term1*term2 == 0) simplify(eq) sim...

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Closed form not the same as the discrete form
Hi Tworit, I'm not quite following how the code is trying to implement equation 41 from the linked page. Here is one way to cre...

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Respondida
Removing all elements from a struct field
Does rmfield meet the need? % create a struct for example for ii=1:13 aap.acq_details.sessions(ii).name = ii; end aap.acq_d...

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Respondida
Graphs using ode45 do not look like they should. Why is time vector not a linear set?
Hi Josh, Maybe the plots are deceptive. Running the code exactly as given, except for the plotting, shows that v is the derivat...

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Respondida
FT and Amplitude Phase plot in matlab
The code as shown has at least two issues. When using symbolic math, need to declare variables appropriately syms t w real Bec...

alrededor de 4 años hace | 1

Respondida
Add Fields to an existing Structure
S.Level0=0; f = {'SubLevel0','SubLevel1','SubLevel2','Text'}; cvar = '1234'; S = setfield(S,'Level1',f{:},cvar); S.Level0 S...

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Respondida
please help to fix my code for 4th order Runge Kutta method for second order ODE.
Hi Siti Nafisah Bekti Lelana, Why do you think it's the wrong answer? I didn't check the equations, but the code seems to yield...

alrededor de 4 años hace | 0

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calculate the Γ matrix in MATLAB from Φ Matrix - State space equation
Let's see what we have so far: A = [0 1; -1 -1]; b = [0;1]; I = eye(2); syms s; LaplaceTransitionMatrix = (s*I-A)^-1 phi =...

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Respondida
Cumulative sum in Simulink
The Discrete-Time Integrator block can be configured as an accumulator.

alrededor de 4 años hace | 1

Respondida
How do I construct the dft response of hanning window
Hi Sahil, The code doesn't show the values of N and T used, so I'll make up my own. N = 64; % T = 1; Changed the next line s...

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Pregunta


Does surf() Behave as Expected with ndgrid() Inputs?
Define a function clear f = @(x,y) x; Case 1: square mesh, meshgrid, vector inputs to surf x = 0:5; y = 100:105; [Xmesh,Ym...

alrededor de 4 años hace | 1 respuesta | 0

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Respondida
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(...

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Respondida
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)

alrededor de 4 años hace | 0

Respondida
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...

alrededor de 4 años hace | 1

Respondida
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...

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Respondida
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...

alrededor de 4 años hace | 1

Respondida
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...

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Respondida
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...

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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*...

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Respondida
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...

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Respondida
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...

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Respondida
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 ...

alrededor de 4 años hace | 0

Respondida
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(:)]...

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Pregunta


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

alrededor de 4 años hace | 3 respuestas | 0

3

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

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Respondida
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...

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Respondida
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...

alrededor de 4 años hace | 1

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