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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...

presque 4 ans il y a | 3

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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...

presque 4 ans il y a | 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 =...

presque 4 ans il y a | 2

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

presque 4 ans il y a | 1

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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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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...

environ 4 ans il y a | 1 réponse | 0

1

réponse

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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(...

environ 4 ans il y a | 1

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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)

environ 4 ans il y a | 0

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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...

environ 4 ans il y a | 1

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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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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...

environ 4 ans il y a | 1

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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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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...

environ 4 ans il y a | 0

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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*...

environ 4 ans il y a | 0

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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...

environ 4 ans il y a | 1

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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...

environ 4 ans il y a | 0

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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 ...

environ 4 ans il y a | 0

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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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Question

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

environ 4 ans il y a | 3 réponses | 0

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

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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...

environ 4 ans il y a | 2

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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...

environ 4 ans il y a | 1

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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...

environ 4 ans il y a | 0

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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...

environ 4 ans il y a | 1

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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...

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

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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...

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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...

environ 4 ans il y a | 0

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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...

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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...

environ 4 ans il y a | 0