Frage

Why Does polyval Return Zero When the Coefficients are Empty?
polyval([],1) polyval(ones(1,0),1) Do those results follow from a mathematical justification or are they arbitrarily specified...

6 Monate vor | 3 Antworten | 1

3

Antworten

Beantwortet
pwelch method of power spectral density (psd) calculation
As to why pwelch applies datawrap for the case nfft < numel(win) ... I did a bit more searching to try to find the motivation f...

6 Monate vor | 0

Beantwortet
Zero gain margin for an stable system from both allmargin and margin
I believe that allmargin yields a result that a user could incorrectly interpret for this example. Define the open-loop transfe...

6 Monate vor | 0

Beantwortet
Direct Dynamics of Two-Link Manipulator
It looks like the Matlab Function block is commented. Right click on it and then click Uncomment on the pop-up menu.

6 Monate vor | 0

Beantwortet
Trying to filter timeseries data by logical index on time within matlab function block but it tells me property Time not recognized as valid
Hi Matthew, The output signal of the From File block is not a time series, it's probably a double. The output from the Constan...

6 Monate vor | 0

Beantwortet
Does [V,D] = eig(A) always return normalized eigenvectors for any real matrix A?
Whether or not the columns of V are normalized to unit magnitude depends on how eig is called. See eig - Eigenvalues and eigenv...

6 Monate vor | 1

| akzeptiert

Beantwortet
Rate Limiter in enabled subsystem
I tried a Rate Limiter block inside an Enabled Subsystem and the simulation ran to completion in both Normal and Accelerator mod...

6 Monate vor | 1

Frage

What is the Best Way to Call Matlab from a C++ Program and Return Results to that Program?
What is the best way to call Matlab from a C++ program and return results to that program? So far, I can see two options: 1. U...

6 Monate vor | 0 Antworten | 0

0

Antworten

Beantwortet
How to make a matlab script that runs simulink model to run parallel instances of the model
Hi alberto, The third input to setVariable should be the actual value of the variable. simIn(idx) = simIn(idx).setVariable('Se...

6 Monate vor | 0

| akzeptiert

Beantwortet
How to Configure Simscape Multibody Block Parameters Using MATLAB
Hi Justina, It does appear that the Simscape Multibody documentation is sparse to non-existent on programmatic use of block par...

6 Monate vor | 1

| akzeptiert

Beantwortet
Robust Control: dksyn example
I believe the issue here is that: the plant is unstable, the construction of P2 duplicates all of the states in the generalize...

6 Monate vor | 0

Beantwortet
A quarter car model with additional massless degree of freedom for the top mount
Hi @Simon Aldworth Seems like the equation for the massless element would be: m5*x5ddot = kp * (x1 - x5) + cs * (x2dot - x5dot...

6 Monate vor | 0

Beantwortet
How can I store data from my simulink model in and and use it during runtime.
Does the trigger event enable the execution of an enbabled subsystem? Is the data to be captured from a signal inside that enabl...

6 Monate vor | 0

Beantwortet
simulink reference block or library block
Hi stephane, Component-Based Modeling Guidelines - MATLAB & Simulink is a good place to start, followed by the links at the bot...

6 Monate vor | 0

Beantwortet
searchin for an M file in all folders of my PC.
The dir command can recursively search. I think for this question it would be d = dir("C:\**\filetofind.m")

7 Monate vor | 1

Beantwortet
Repeated uncertanity Blocks in robust control
Hi Amit, As far as I can see, mussv does not support repeated, full, complex blocks. Out of curiosity, in what sort of problem...

7 Monate vor | 0

Beantwortet
Why Does ifourier Not Return Equivalent Results for Equivalent Transforms?
Tech Support confirmed a bug (and it's quite pernicious IMO). Their suggested workaround for this particular problem is to simp...

7 Monate vor | 1

Frage

Why Does ifourier Not Return Equivalent Results for Equivalent Transforms?
Consider two expressions of a Fourier transform syms t omega real HU(omega) = -(exp(-omega*1i)*(exp(omega*1i) - 1)*(omega + 1i...

7 Monate vor | 1 Antwort | 0

1

Antwort

Beantwortet
Any way to remove terms smaller than "digits" from symbolic expression? R2023a
"Uh, it's always the term that's on the order of the smallest number representable by digits." Giving the benefit of the doubt ...

7 Monate vor | 1

Beantwortet
Accessing Simulink model inputs and outputs when stepping model via MATLAB set_param(mdl, 'SimulationCommand', 'step') command
Hi Sebastian, Check out the doc page for using a simulation object. It make it easier to do what you want.

7 Monate vor | 1

Frage

Why Doesn't pwelch with the 'centered' Option Follow the Same Convention as fftshift for Even nfft?
When the fft length is even, fftshift flips the input so that the Nyquist point is to the left. But pwelch with freqrange = 'cen...

7 Monate vor | 0 Antworten | 0

0

Antworten

Frage

Should Unity Value be Displayed when Multiplied by a symunit?
The following results look peculiar IMO. Shouldn't a unit always be preceded by a value? I've never seen this convention before....

7 Monate vor | 0 Antworten | 0

0

Antworten

Beantwortet
Adding a single left bracket and a single right bracket to a matrix
I'm not sure if this can be done in the command window, but in a Live Script matrix output can be shown with square brackets. A...

7 Monate vor | 1

| akzeptiert

Beantwortet
problem with coeffs command
syms w z u y v x 5*w - 5*z - u*((603367941593515*x)/4503599627370496 - y/2) - v*(x/2 + (603367941593515*y)/4503599627370496) - ...

7 Monate vor | 1

| akzeptiert

Beantwortet
power spectral density of nonstationary data
Hi hxen, When uploading the data in a .csv file, please also include the code that reads the data from that file. It wasn't har...

7 Monate vor | 0

| akzeptiert

Beantwortet
Can Simulink and other simulation software be repeatedly executed through Matlab scripts when simulating together？
Hi yiwei, There are several options for running Simulink simulations from Matlab scripts. Start from Run Simulations and then g...

7 Monate vor | 0

Frage

Does isAlways Make an Unwarranted Assumption that a Variable is real?
Define a sym variable syms v isAlways can't prove that v is real. Makes sense. isAlways(in(v,'real')) Now make an assumption...

8 Monate vor | 0 Antworten | 2

0

Antworten

Beantwortet
Biquad IIR filter design with Q factor sorting?
Hi Jay, h = fdesign.lowpass('N,Fc', 8, 10e3, 100e3); % 4-biquad with 100kHz sampling rate and 10kHz cutoff freq Hd = design(h...

8 Monate vor | 0

| akzeptiert

Beantwortet
Unable to access parameters of the block "enable"
The "Data Type" parameter is on the Signal Attributes tab, but as stated in the Block Parameters dialog (as shown in the sceen c...

8 Monate vor | 0

| akzeptiert

Beantwortet
CONVERT FREQUENCY DOMAIN DATA TO TIME DOMAIIN
Here's an example that illustrates the potential utility and pitfalls of this approach. EDIT: 19 Jan 2026, updated code to ensu...

8 Monate vor | 1