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Feeds
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...
3 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....
3 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...
3 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) - ...
5 days 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...
6 days 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...
6 days 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...
13 days 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...
20 days 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...
20 days 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...
23 days 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...
30 days 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...
1 month 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 =...
1 month 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...
1 month 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...
1 month 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...
1 month 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 ...
1 month 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...
2 months ago | 0
Can I use imported from matlab workspace matrix in simulink function block?
Assuming the intent is to implement this function in a Matlab Function block, then see Use Data in Multiple MATLAB Function Blo...
2 months ago | 0
how do I change the abscissa (x -axis) of a cosine wave plot to show degrees
Change the plot command so that the independent variables are in deg. Or define x in terms of deg and then use cosd to compute y...
2 months ago | 0
| accepted
Question
Is There an Inconsistency with How Unassigned Values are Filled After an Assignment into a Table?
Create an empty table T = table; Assign a string value to the third row a new variable T.string(3) = "abc" The values in row...
2 months ago | 2 answers | 1
2
answersconvolution integral with ode45
If c(t) has a Laplace transform then we can take advantage of the convolution property and convert to the s-domain, solve for U(...
2 months ago | 1
How to run code from a later line multiple times without restarting the whole script?
See Create and Run Sections in Code for how to divide the script (assuming it really is a scipt and not a function) into section...
2 months ago | 0
| accepted
Trouble making a parameter sweep for Simulink
Try out = sim(model); More generally check out Simulink.SimulationInput and Optimize, Estimate, and Sweep Block Parameter Valu...
2 months ago | 0
| accepted
Help with exporting variables from function to workspace to then run in simulink file
The "modern" way to do this with the sim command is to use a Simulink.SimulationInput as the input. See that doc page to get sta...
2 months ago | 1
Save data from Simulink Scope
"I have this setting: is it correct?" It's correct if you want all of your logged variables to be contained within a single var...
2 months ago | 0
| accepted
How do I import an audio file into simulink?
Hi Victor, It's not clear why it would be more convenient to do this in Simulink, but if that's really the case then perhaps th...
2 months ago | 0
| accepted
