Answered
Im trying to convolute a rect function and a sinc function
Because Gz is a variable, not a function, Gz(z) is trying to use the vector z as an index into the variable Gz. But z contains ...

4 years ago | 0

Answered
design error of closed loop linear quadratic gaussian(LQG) regulator
Hi @Jun Seung Mun I think there are a few issues with the code. First, the plant should have at least one input for the control...

4 years ago | 0

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Answered
I want to replace more than 1 random words in a sentence with "___" using matrices. I can type it out long hand but want to avoid this.
Hi Cade, It would be helpful to include an example input and show what the desired output should be. As best I can tell, maybe...

4 years ago | 1

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Answered
Difference between lhsnorm and normrnd
The doc page for lhsnorm is surprisingly sparse. But it does talk about the multi-variable normal distribution, in which case si...

4 years ago | 0

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Answered
How do I reverse the effect of an integral block?
Hi Janith Are you sure the encoder is a pure differentiator? Even if it is, the simulation is likely to have problems with the...

4 years ago | 0

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Answered
Can FILTFILT(B, A, X) yeild the same results as FILTFILT(SOS, G, X) assuming inputs are generated via [z,p,k] = butter(3,Wn) + [sos,g] = zp2sos(z,p,k) and [A,B] = butter(3,Wn)
Hello Chris, Here's the code I ran (unknown to me, butter() assumes a bandpass by default with a two-element frequency vector, ...

4 years ago | 1

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Answered
Why does integrating my signal attenuate it?
Hi Janith, If the input to the integrator block is u(t) = sin(w*t), the output of the integrator will be y(t) = -1/w*cos(w*t) ...

4 years ago | 2

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Answered
What is the best way to make bodemag of multiple MIMO systems distinguishable? Markers?
Hi @Bruno Dogancic Here's some code to put an 'o' marker on every 10th data point. Adapt as needed to change markers, line styl...

4 years ago | 0

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Answered
How can i force simulink to use a set of data from another simulink model ?
Try using the sim() command instead of set_param. I had trouble with the latter, but no problems with the former. This code wo...

4 years ago | 0

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Answered
Is there a function like "y = filter(b,a,x,zi) uses initial conditions zi for the filter delays" in fftfilt? If not, what's the most efficient way to implement this?
Filtering is a linear operation so the iniital condition response and the input response can be computed separately and then add...

4 years ago | 1

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Answered
How to put this transfer function into simulink
The transfer function in question syms s H(s) = -(1 - 0.5*exp(-10*s))/(40*s + 1)/(15*s + 1) Starting from a single input sign...

4 years ago | 0

Answered
How to get simplified, symbolic solutions for definite integrals
Declare x w to be real syms x w real fn1 = exp(-abs(x))*cos(w*x) int(fn1, x, [-inf inf])/sym(pi)

4 years ago | 0

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Answered
I am trying to use the rectangular pulse function, but I am not sure how to use it correctly to solve a Fourier problem.
Hi Connor, This question brings up some interesting aspects of Fourier analysis, and how transforms of the discrete-time sample...

4 years ago | 0

Answered
Matlab and Routh criterion for evaluation of K for stability
Hi @omar khasawneh, Without a value for K I think you'll need to use the Symbolic Math Toolbox. Your code adapts easily. I did ...

4 years ago | 4

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Answered
Lsim inputs inversion provide the same result
Interesting. A quick look at the code, at least for the case where an output argument is specified, shows that the function tha...

4 years ago | 1

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Answered
FFT of the average vs average of the FFT
For a matrix input, fft() works down the columns. Maybe this: rng(100); S = rand(5); fft(mean(S,1)) % mean for each column,...

4 years ago | 0

Answered
Continuous Convolution in Time Domain
Hello @Masoud Nateghi The code needs to use the full convolution sum to approximate the convolution integral. Also, because the...

4 years ago | 0

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Answered
Impulse and step response differences
Hello @Arcadius, The differential equation in the Question is ambiguously written. Your solution for the impulse response assum...

4 years ago | 1

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Answered
FFT of Gaussian filter in 1D
Hello @Donya Khaledyan The code in the question doesn't define t nor FGHE2, so the plots can't be recreated. Code below might b...

4 years ago | 1

Answered
Find indices of multiple strings within another string
It looks like using string variables with an inner loop is much faster than a cell array with cellfun, at least here on Answers ...

4 years ago | 0

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Answered
How to do Pade approximation with different order of numerator and denominator in Matlab
The Sybolic Math Toolbox has a function pade() where the order of the numerator and denominator can be specified separately. The...

4 years ago | 0

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Answered
Root Locus system description at given point not showing up
Is there any chance that you have some local version of rlocus() that is shadowing the Control System Toolbox? What is the outpu...

4 years ago | 1

Answered
Analog Bessel filter output problem (nan)
The num and den inputs to filtfilt() are for a discrete-time filter. But besself() returns the numerator/denominator for a cont...

4 years ago | 0

Answered
Fourier expansion of dirac delta function
Increasing n to better approximate the infinte sum yields L=10; F0=10000; v0=1; t=4; x=-10:0.1:10; n=400; f=0; for i=1:n...

4 years ago | 0

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Answered
squeeze function returning "NaN"
squeeze() can't ignore anything. If the input to squeez() is 1 x 1 x 33 matrix of NaN, the ouptut will be 33 x 1 of NaN. What ...

4 years ago | 0

Answered
Sum in two variables for response of NON-LTI discrete time system
Hi @ALESSIO MANIÀ 1. The loop should be over n, beause each time through the loop it should be computing y(ni), i.e., a single ...

4 years ago | 0

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Answered
How can I normalize my filter?
Hi @Amy Lg Why is fs defined and then multiplied by 1e9 in the call to bilinear? Which I guess might be o.k. but perhaps isn't...

4 years ago | 0

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Question

Is There a Way to disp a sym Double Subscript?
dips() works fine with a single subscript disp(str2sym("E_omega")) Double subscript looks odd disp(str2sym("E_omega_n")) Any...

4 years ago | 1 answer | 0

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answer

Answered
What does my Root Locus response mean? Why is it different?
Hello @Joel Okanta The root locus is much more general than as suggested in the Question. Given a system described by an open l...

4 years ago | 0

Answered
Solving a nonlinear system differential equation using symbols
When using ReturnConditions, the outputs need to include Parameters and Conditions, or use only a single output syms a b c d e ...

4 years ago | 0