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Paul


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I am trying to implement a state space solution in Simulink with 1 variable m in matrix C, but the runtime error says Variable ‘m’ does not exist.
The Goto block is used for signal flow, not assignment to a variable. The Constant1 and Goto blocks can be deleted. The easiest...

2 days ago | 0

Answered
vpasolve giving incorrect answers for a system of trigonometric equations. How do I set bounds to the solution?
Hi Nat, I didn't try to analyze the equations to be solved, but they appear to be very sensitive to the actual values of Sa1, S...

2 days ago | 0

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Question


Should table Indexing be Faster?
Example code. t = combinations(0:10,0:10,0:10,0:10); tic for ii = 1:10 for jj = 1:height(t) u = t{jj,:}; ...

2 days ago | 2 answers | 2

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answers

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Increase temporal granularity in simulink
Do you just want to set the maximum step size for the solver?

3 days ago | 0

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Question


Can a system() Command be used Inside a Function Called from Inside a parfor Loop?
Is the following code allowed: result = zeros(100,1); parfor ii = 1:100 % do something result(ii) = myfun(resul...

4 days ago | 1 answer | 0

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answer

Answered
Simulink model parameter update and observations at discrete times
I think you can do exactly what you want using the new (since 2024a) simulation object.

5 days ago | 0

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Simulink Variable Time Logging
One approach ... Put a To Workspace block with inherited sample time inside a Triggered Subsystem. Send the data to be logged ...

6 days ago | 0

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What is the reference level used in spectrogram power computation?
Hi Ethan, In signal processing the concepts of power and energy are similar to, but not exactly the same, as the what those ter...

10 days ago | 0

Answered
How to label a signal using a sub-system mask parameter in Simulink?
Hi Kevin, I was able to change a signal name in the masked subsystem using code in the mask initialization code. In my simple e...

11 days ago | 0

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Spectrogram output versus figure
Hi DLR, Stepping through spectrogram shows that, when output argruments aren't specified, the PSD data that's plotted is offset...

12 days ago | 0

Question


How Does SeriesIndex Work with LineStyleOrder?
My interpretation of SeriesIndex is that it controls the color and style of a line based on the ColorOrder and the LineStyleOrde...

16 days ago | 1 answer | 0

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Answered
Solve more complex problems in matlab
Modifying the approach from the question, using solve seems to work fine. syms x m real eq = (m-2)*x^2-3*m*x+(m+2) == 0; eq_r...

17 days ago | 0

Answered
Failing to create matrix from cell array in several ways
Hi Amit, To subscript into a cell array and return a cell array, use () as with normal array indexing, which should have worked...

29 days ago | 0

Answered
Maybe a mistake in the documentation of function ''robgain''
Hi Hongrui, I agree that the statement on the doc page for that example is incorrect. At the bottom of the page you can click ...

29 days ago | 1

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Answered
allmargin gives incorrect answers for some discrete time systems
Hi Carlos, In 2024a, allmargin introduced a new "Focus" input. Check the doc page for more information. As far as I can tell, ...

1 month ago | 0

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Answered
Using ss2tf when your matrices are variables without values yet
Hi Wynand, For a low-order problem like this, you can use the Symbolic toolbox to evaluate the equtation that computes the tran...

1 month ago | 0

Answered
How to convert euler angles to rotation matrix and back to euler angles consistently?
"While I am aware of the intermediate steps, I kind of expected the inbuilt matlab functions to be consistent during the to-and-...

1 month ago | 1

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Invalid setting in 'Model' for parameter 'Gain'.
Hi SM, Try usin the setVariable method in the Simulink.SimuationInput object. function objective_func = F3(x) mdl = "Model"; ...

1 month ago | 0

Question


What is the Image Processing Toolbox Convention for Input to freqz2() ?
I was trying to learn how to use the function freqz2 in the Image Processing Toolbox. That doc page says that the FIR filter inp...

1 month ago | 1 answer | 0

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answer

Answered
Combined Discrete-Continuous Simulation In SIMULINK
Hi Sajjad, It sounds like you want to use the feature of the Integrator block for Resetting the State. At every t_i, you can re...

1 month ago | 1

Answered
Calculating Power of Specific Spatial Frequencies of pictures
Hi Olivia, The equations for u and v are correct if rows and cols are both even. Otherwise, they'd have to be adjusted. Regard...

2 months ago | 0

Answered
choose B or C or D if A does not exist - how to write this?
Create an example structure data.THDA = 1;data.THPP = 2;data.THDP = 3; Use fieldnames to get the fields of data fnames = fiel...

2 months ago | 0

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Answered
How to save an output from Simulink into MatLab during different iteration ?
Hi Ronan, Based on the description, there are probably several options, but hard to say specifically becasue we don't know exac...

2 months ago | 0

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Answered
Bivariate normal value standardization
Hi CJ, In short, the area of integration for the X1 case is no longer a rectangle as is assumed by mvncdf Define the original ...

2 months ago | 0

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Answered
How do I solve this error in Parameter Setting for 2-D Lookup Table Block in Simulink?
% Create a surrogate model for vehicle longitudinal dynamics % Set model name modelName = 'VehicleLongitudinalSurrogate'; % C...

2 months ago | 1

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Answered
Application of multistage decimator filter to signal
As shown at designMultistageDecimator, this function retruns a dsp.FilterCascade object M = 48; Fin = 30.72e6*M; Astop = 90; ...

2 months ago | 0

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Simulink Model to transfer function via simulink and Matlab
Hi Yuval, What is the setting for the c parameter in the Derivative blocks? If it's the default (inf), those blocks will linea...

2 months ago | 0

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Answered
In Simulink, why do two unrelated modules affect each other?
Even if A and B are not connected, changes in B can causes changes in output of A because those changes in B can affect the step...

2 months ago | 0

Answered
Create Variable in Simulink block that contains 63 elements.
Hi David, Question is a bit unclear. As shown, it appears the model has 63 separate Sine Wave blocks. That means each time th...

2 months ago | 0

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Answered
Shiftet values of omega in bode plot as result from generating idfrd() and tfest()
If fre is in Hz, then this line frerad = fre.*(pi/180); should be freqrad = fre*2*pi; to convert to rad/sec

2 months ago | 0

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