Paul
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Contribute at least one answer each month for 36 consecutive months
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Content Feed
sum filed in struct
% example data Sis.PV = 20; Sis.PV = repmat(Sis.PV,1,82); Sis sum([Sis.PV]) See this tutorial on how to use comma separated...
environ 9 heures il y a | 1
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...
environ 22 heures il y a | 0
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...
1 jour il y a | 1
| A accepté
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...
2 jours il y a | 0
Finding Generalized Plant matrix
Hi Ömer, Did you try constructing P exactly as written, with the 0 entries of correct dimension?
4 jours il y a | 0
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...
4 jours il y a | 0
| A accepté
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...
8 jours il y a | 1
| A accepté
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)...
8 jours il y a | 0
| A accepté
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 (...
10 jours il y a | 1 réponse | 0
1
réponseneed 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...
11 jours il y a | 0
| A accepté
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...
12 jours il y a | 0
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...
13 jours il y a | 2
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...
13 jours il y a | 0
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 ...
14 jours il y a | 0
| A accepté
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...
16 jours il y a | 1
| A accepté
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)
17 jours il y a | 0
| A accepté
Algebraic loop error - Simulink
Hi John, The model equations as implemented are: (1) actual_height = new_height (2) new_height = displacement + actual_heigh...
17 jours il y a | 0
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...
18 jours il y a | 1
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 ...
18 jours il y a | 2
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...
18 jours il y a | 1
| A accepté
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.
18 jours il y a | 0
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...
19 jours il y a | 2
| A accepté
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 ...
19 jours il y a | 0
| A accepté
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...
19 jours il y a | 1
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 ...
20 jours il y a | 2
| A accepté
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...
29 jours il y a | 0
| A accepté
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 ...
environ un mois il y a | 1
| A accepté
Extract contents of cell array based on rows
Without having example data to try .... result = cellfun(@(A) A(:,3)>3,A,'UniformOutput',false);
environ un mois il y a | 0
| A accepté
More accurate alternative to rlocfind to analyze root locus in control systems engineering
Link to answer to a similar question
environ un mois il y a | 0
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...
environ un mois il y a | 0
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