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# Paul

Last seen: Today Active since 2011

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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...

4 días ago | 0

6 días ago | 0

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...

6 días ago | 0

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 días ago | 0

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 días ago | 0

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

11 días ago | 0

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 días ago | 1

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 días ago | 0

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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 días ago | 2

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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 días ago | 0

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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 días ago | 1

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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 días ago | 1

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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 días ago | 0

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 días ago | 1

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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(...

20 días ago | 1

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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 días ago | 0

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 días ago | 0

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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...

22 días ago | 0

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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...

22 días ago | 0

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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 días ago | 0

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 días ago | 1

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 días ago | 2

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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 días ago | 0

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 días ago | 1

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The Discrete-Time Integrator block can be configured as an accumulator.

27 días ago | 1

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 días ago | 0

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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 días ago | 1 answer | 0

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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(...

alrededor de 1 mes ago | 1

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