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Feeds
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...
2 days ago | 0
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...
3 days ago | 0
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...
4 days ago | 0
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 days ago | 1
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...
11 days ago | 0
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...
12 days ago | 1
Question
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...
13 days ago | 1 answer | 0
1
answerAny 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 ...
21 days ago | 1
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.
24 days ago | 1
Question
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...
29 days ago | 0 answers | 0
0
answersQuestion
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....
29 days ago | 0 answers | 0
0
answersAdding 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...
29 days ago | 1
| accepted
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) - ...
1 month ago | 1
| accepted
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...
1 month ago | 0
| accepted
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...
1 month ago | 0
Question
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...
1 month ago | 0 answers | 2
0
answersBiquad 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...
2 months ago | 0
| accepted
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...
2 months ago | 0
| accepted
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...
2 months ago | 1
Can this symbolic expression be simplified anymore?
"In terms of simplifying, you could flip upside down to get rid of the one/over." Can try using numden, though the result might...
2 months ago | 0
Question
Is the Order of Function Evaluation Guaranteed when Function Outputs are Concatenated into an an Array?
Suppose I call two functions within concatenation into an array A = [ones(1,2),zeros(1,2)] In this case, the order in which on...
2 months ago | 2 answers | 1
2
answersHow do I perform a proper FFT of a gated segment of a time domain waveform with a logmag amplitude?
Generate a 512-point reference signal in the time domain Ts0 = 0.01; Fs0 = 1/Ts0; N0 = 512; n0 = 0:N0-1; t0 = n0*Ts0; y0 =...
2 months ago | 0
| accepted
Find the transfer function of a differential equation symbolically
The function isolate comes in handy for this type of problem. syms u(t) y(t) dydt(t) t s Y(s) U(s) y0 dydt0 u0 omega_n z K % S...
2 months ago | 1
Comment utiliser les transformées de Laplace ? How to use Laplace transforms
Hi Gilles, The documentation provides a detailed example at Solve Differential Equations of RLC Circuit Using Laplace Transform...
2 months ago | 0
Question
How Does interp1 Work if the Sample Points are not Monotonic?
Forever I've thought that the sample points input to @doc:interp1 have to be distinct AND monotonic. But I just saw on the doc p...
2 months ago | 1 answer | 0
1
answerLinear interpolation with interp1 is slow: How to improve run times?
Hi Alessandro, The base version of interp1 is an ordinary m-file, so you can see all of the extra processing it needs to do to ...
2 months ago | 3
| accepted
Question
Is this Application of Leibniz Rule in Symbolic Math Toolbox Incorrect?
Referring to Leibniz Integral Rule: Verify R2025b matlabRelease Define some functions syms t x syms f_1(x) f_2(x) g(t) Cas...
2 months ago | 0 answers | 0
0
answersTrouble with Interp2
Hi Peter, I think the arguments to interp2 are backwards, but there are some other considerations Ir_10nm_Cr_10nm= [... 0....
2 months ago | 0
| accepted
"diff" function doesn't work properly with small numbers
The data in gora and dol are on the plot as can be seen below when using markers. However, if the y-data pattern is increasing-...
2 months ago | 1
| accepted
Discussion
Use of AI to Generate Matlab Code
Inspired in part by Christmas Trees, I'm curious about people's experience using AI to generate Matlab code. 1. Do you use AI t...
3 months ago | 0
