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Paul


Last seen: Today Active since 2011

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Answered
How to use Convolution in Simulink?
I think this model does what you're looking for. Here is the model that uses the convolution sum to approximate the convolution...

3 Tage ago | 0

Answered
Sensitivity analysis in simulink
This page might be of interest.

5 Tage ago | 0

Answered
Compute Probability of a Multivariate Normal Distribution over Polytope
Hi Michael, If A is nonsingular, perhaps a change of coordinates will work % z = A*x muz = A*mux; Sigmaz = A*Sigmax*A.'; Pr...

5 Tage ago | 0

Answered
Warning: Imaginary parts of complex X and/or Y arguments ignored.
Hi Matthew, Why is dhdt the output argument of this line? [t, dhdt] = ode45(@thesis, tspan, [240]); Shouldn't this be [t, h]...

7 Tage ago | 0

Answered
how to inverse transfer function simulink
Hi Stanley. First off you'll need to factor out the exp(-s) and implement that with a Transport Delay block. For the non-prope...

11 Tage ago | 0

Answered
Transformation of state space model
It sounds like the Question is about forming a feedback loop. In this case use feedback.

11 Tage ago | 0

Answered
How to do Feedback Loop on Simulink with different frequinces
I'm assuming the question is how to run the same simulation multiple times for different frequencies. With this assumption .... ...

12 Tage ago | 1

Answered
How to generate all possible vectors where each element can take one of two values
a = [1 2 3]; b = [4 5 6]; n = numel(a); C = mat2cell([a; b],2,ones(1,n)); [D{1:n}] = ndgrid(C{:}); E = sortrows(cell2mat(...

13 Tage ago | 0

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Answered
how to find the right frequency axis when we take the Fourier transform of a function?
Hi Donya, By default, the frequency variable for fourier in the Symbolic Math Toolbox is in rad/sec. Also, Matlab definition o...

13 Tage ago | 2

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Answered
Pade approximant in Transport delay block
What exactly is the confusion? Increasing the order of the Pade approximant should have no effect on simulation run time or sim...

13 Tage ago | 0

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Answered
Discrete values in DFT
Hi Sahil, In general: Let x(t) be a continuous-time signal, i.e., where the inedpendent variable, t, is any real number with -...

14 Tage ago | 1

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Answered
matlabFunction() generating intermediate terms that place the integrand outside integral()
A couple of suggestions on the code. As a general rule IMO, it's best to specify all relevant assumptions on the variables. For...

14 Tage ago | 1

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Answered
help in runge kutta 4 2nd order with establishing the functions
Ok. Let y1 = q and let y2 = qdot (or y2 = q and y1 = qdot if preferred) Then the first equation we need is y1dot = qdot = y2. ...

19 Tage ago | 0

Answered
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...

19 Tage ago | 1

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Answered
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(...

19 Tage ago | 1

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Answered
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 + ...

20 Tage ago | 0

Answered
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...

20 Tage ago | 0

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Answered
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...

21 Tage ago | 0

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Answered
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...

21 Tage ago | 0

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Answered
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...

23 Tage ago | 0

Answered
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...

24 Tage ago | 1

Answered
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...

24 Tage ago | 2

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Answered
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...

24 Tage ago | 0

Answered
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 =...

26 Tage ago | 1

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

27 Tage ago | 1

Answered
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...

28 Tage ago | 0

| accepted

Question


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...

29 Tage ago | 1 answer | 0

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answer

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(...

etwa ein Monat 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)

etwa ein Monat 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...

etwa ein Monat ago | 1

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