Answered
How can i get frequency domain of an earthquake?
Hi ADNAN, I had a comment in this thread that was mysteriously deleted, so I'll repost here as a separate answer. It looks lik...

3 years ago | 0

Answered
How to sort the cell with string based on dates (earliest date should begin first)
Hi Geerthy, Here is one approach. Some of the steps can be combined if fewer lines of code are desired. c = {'(Z98.1 Z47.89 Z9...

3 years ago | 2

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Answered
Why Execution Order of Sum block is not shown in the Simulink model?
It's possible that Simulink has determined that those blocks don't need to be executed (I think there is a Block Reduction optim...

3 years ago | 0

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Finding Generalized Plant matrix
Hi Ömer, Did you try constructing P exactly as written, with the 0 entries of correct dimension?

3 years ago | 1

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Numerical problems when plotting with fplot
Hi FRANCESCO, I can't explain the inner workings of fplot, but I too have had occasion where it comes up with odd results. Her...

3 years ago | 1

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Answered
Reloading handle objects from .mat files
Hi Matt, It looks like two of the properties are changed, either on the save or on the load. h=plot(1:5); save tst h h2=lo...

3 years ago | 1

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Answered
Is there a distinction between the D term and the derivative component of the PID controller?
If P = I = 0, and D = 1, we're left with: PID(s) = N/(1 + N/s) = N*s/(s + N) With the block parameter value of N = 100 PID(s)...

3 years ago | 0

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Question

What are Your Thoughts on TMW Using Answers as Source of Documentation?
This Question has an answer that links to this doc page. That doc page, in turn, has a direct link to another Question/Answer (...

3 years ago | 1 answer | 0

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need help in understanding with feedback command
Hi shipra, In accordance with the the doc page feedback, the first argument is the forward path gain and the second argument is...

3 years ago | 0

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Answered
Is it possible to change the unit of reluctance block of MATLAB from m.file?
It appears this can be done via typical set_param commands. For example, I have a Reluctance block selected in my model: set_pa...

3 years ago | 0

Answered
Average columns together that share a common value
D = [1, 25 3, 33 3. 45 2, 22 4, 54 4, 56 5, 23 5, 65 1, 27 2, 29]; [G,ID] = findgroups(D(:,1)); [ID splitapply(@mea...

3 years ago | 2

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How do i plot poles of three matrices using different marker for each matrix on same plot using either pzmap or pzplot?
Hi Kamilu, The code calls pzmap twice in the D==70 case. The code checks for a case with D == 7, but the second element throug...

3 years ago | 0

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How to include a model (created by me at Simulink) in Matlab script?
Hi jana, Can you clarify this statement: "I couldn't use the state space representation because I have a disturbance acting on ...

3 years ago | 1

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Answered
State-space input response
Hi Yasin, You can create a model using ss. Wtih that model you can simulate the repsonse to the initial condition and the input...

3 years ago | 1

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Answered
How to access only the first element of the variables in a structure array as a vector?
One option S(1).Location = [1 4]; S(2).Location = [4 15]; S(3).Location = [3 7]; L = arrayfun(@(S) S.Location(1),S)

3 years ago | 0

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Answered
Algebraic loop error - Simulink
Hi John, The model equations as implemented are: (1) actual_height = new_height (2) new_height = displacement + actual_heigh...

3 years ago | 0

Answered
Zero pole with 2 poles change s value
I guess you'd first rewrite it in zpk form as K1*Tm/(T1*T2) * (s+1/Tm) / ( (s + 1/T1) * (s + 1/T2) ) so the gain is K1*Tm/T1/T...

3 years ago | 1

Answered
I don't understand this command : F=find(B>4)
B is a 2D matrix. B=[1 2 3 4; 5 6 7 8] This command finds the "linear indices" of the elements of B that satisfy the criteria ...

3 years ago | 2

Answered
Filter coefficients from frequency response with invfreqs/invfreqz
Assuming that f_APSD is in Hz, the filter, h, below gives a reasonable match to APSD. df = 0.1; f_a = 20; f_b = 100; f_c = 30...

3 years ago | 1

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Answered
Use Simulink PreSimFcn to set metadata in a Simulink.SimulationOutput object
Hi Afzal, You can store data into the Simulink.SimulationOutput object via the SimPostFcn. Here is an example.

3 years ago | 0

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Confusing error when choosing the appropriate loop opening location for TuningGoal.Sensitivity()
Hi Dhilen, The error message shows up because CL0 does not include those analysis points R_f = 0.1; L_f = 8*10^-3; R_li = 20...

3 years ago | 2

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Answered
Simulink: how to define variable that will remain constant during duration of simulation and use in MATLAB function blocks
For part a), a Tapped Delay block seems like it meets the need. For part b), in the absence of any other information, feed the ...

3 years ago | 0

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Answered
Huge scaling factor on amplitude in NUFFT vs FFT
In the fft section, the variable dft_trajectory is defined as % dft_trajectory = abs(fft(raw_trajectory(:,i))/m); but t...

3 years ago | 1

Answered
How to modify H-infinity controller set up to scale controller output?
Hi Jiten, I believe there are some issue with the code, which I've modified as follows. Define the plant b1 = -356.3851; b2 ...

3 years ago | 2

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Answered
Working with cell arrays
example = [ 5 2.3 1.7 5 0.2 9.1 99 3.3 3.6 99 4.1 3.2 99 5.1 2.2 103 1.1 6.8 ]; G = findgroups(example(:,1)); A = spl...

3 years ago | 0

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Answered
Commenting out Simulink block changes in unrelated system
Hi John, Do you have reason to believe that either pair of responses is correct? Just asking because having some idea what the ...

3 years ago | 1

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Answered
Extract contents of cell array based on rows
Without having example data to try .... result = cellfun(@(A) A(:,3)>3,A,'UniformOutput',false);

3 years ago | 0

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Answered
More accurate alternative to rlocfind to analyze root locus in control systems engineering
Link to answer to a similar question

3 years ago | 0

Answered
How to convert a transfer function into state space representation?
The state space realization of a transfer function is not unique. In fact, there are infinitely many state space realizations t...

3 years ago | 2

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Storing Arrays in a Matrix
Hi Edoardo, The ; concatenates the elements vertically. Use a , to concatenate horizontally x = (1:3).'; y = (4:6).'; % examp...

3 years ago | 1

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