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I want to integrate a symbolic matrix numerically. How can I do it??
I don't think there's a function for numerically integrating an arrayvalued function of two variables. Here's a loop approach to...

alrededor de 3 años hace | 0

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How do I get rid of the sinusoidal wave in my output waveform for fourier series sawtooth waveform?
Hi Chaileen, It looks like you're trying to use a summation like this: for n = 1:8 y2 = y2 + B(n)*sin(2*pi*n*t2/(T0)) en...

alrededor de 3 años hace | 0

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Find the nonzero maximum frequency corresponding to FFT graph.
If the DC offset is of interest (or even if it isn't) [maxSOa,index] = max(SOa(2:end)); % ignores first point a f=0 F_fake = f...

alrededor de 3 años hace | 0

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I dont understand why the variable x is incorrect.
Hi Nam, What is the justification for the computation of r(1,:)? If you're trying to find the extrema of J0, why use fsolve to...

alrededor de 3 años hace | 0

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Programmatically change MATLAB Fcn Block Function Configuration Script
Hi Aarish, This worked for me. config = get_param(gcb,'MATLABFunctionConfiguration'); % Matlab Fcn block selected in Simulink ...

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Finding intersection of rlocus branch and a line at an angle
One way would be to use the output arguments from rlocus to get the closed loop pole locations and the associated gain. Here's ...

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Step() not working as expected with USS state space (Uncertain Sys)
Hi John, Disclaimer: I'm not really a user of the Robust Control Toolbox. I'm not quite sure how to interpret the discretizati...

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Applying array of transform matrices to array of vectors
Check out pagemtimes. Whether or not it's faster than a loop ... would need to be tested on your system D = rand(3,3,700); v ...

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How to tell if an object is an Uncertain state-space (USS) model?
Hi @John Looks like isuncertain can be used to query if the input is uncertain. Also, there is a function isStateSpace that c...

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Spectrogram function cutting off beginning and end of signal
Hi Danielle, Create a fake signal using the the parameters in the question downsampledrate = 2e3; rng(100); originalsound = ...

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Converting frequency domain to Time Domain using IFFT
Hi luo xj, Would need more information on what you have. Here is an example showing how to reconstruct a signal. Maybe it can ...

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Сan not identify block
Right click on the block and then click on Help, which will take you the doc page for the block.

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How to handle empty input arguments with the arguments block?
It sees like, at least based on the examples in the Question, the desire is to have a value of empty be overwritten with some ot...

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Chebyshev smoother, I cannot get this to run, I dont understand why.
Hi Nathan, Can't run the code because not all of the information needed to run it is provided. dtVx = rho*resolx.^2./(4*eta_nb...

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How can I set this model properties ( Enable model access to base workspace ) by API such as set_param command?
Does set_param('f14','EnableAccessToBaseWorkspace','off') do what you need? Link to Doc Page The doc page says the parameter...

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How to incorporate equations in the connect function for control design?
connect only works with lti system objects. Nonlinear elemens have to be linearized around an equilibrium point and the lineari...

alrededor de 3 años hace | 1

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lsim() vs step() : are different responses expected?
@John I was able to recreate your strange result on R2022a. After some investigation, I think I know what's happening. load ...

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Adding InternalDelay for State Space system
Hi John, I suspect the error message is telling you that you can only change the value of internal delays that already exist in...

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How to plot the actual frequency range for the FFT plot?
clear all; close all; clc; %% Signal parameter c = 3e8; % speed of light fc= 10e9; % c...

alrededor de 3 años hace | 0

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A weird feature in the obtained function from calculating the inverse Fourier transform using ifft
Hi Shaily_T, It looks like the purpose of the code is to linearly convolve an input signal with an impulse response via mulitip...

alrededor de 3 años hace | 1

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Omega method to integrate sin function
Hi Tommaso, Starting with the acceleration as in the orginal code (I prefer to use row vectors) % use row vectors fs = 20; % ...

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How to find the correct magnitude/frequency value for FFT when there has noise?
Hi Hantao, Load the data x = readtable('Data.xlsx'); Time = x.Time; Current = x.Current; Plot it figure plot(Time,Current...

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Why is FFT result divided by NFFT instead of the root of NFFT?
Hi Miktat, The energy spectrum and the amplitude spectrum are two different things. Using the conventions of fft, the output yf...

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Why does cconv perform worse than conv?
I ran this code where cconv outperforms conv for large n n = round(linspace(1e3,1e5,50)); n2 = 2.^(5:nextpow2(n(end))); n = s...

alrededor de 3 años hace | 1

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lsim() vs step() : are different responses expected?
The code and the system in the .mat file does not recreate the step plot. There is also an undefined variable. load sys.mat % ...

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What is being "averaged" in the matlab bandpower() function?
Hi Joey, I will confess to only having basic knowledge of this subject and suggest a thorough review of a good textbook. I'll t...

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change class syms to double
Something like this ... e = exp(sym(1)) class(e) format long e = double(e) class(e)

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ifft returns NaN when plotting the impulse response function
Hi 粤轩杨, It looks like h_FFT also has a few values that are inf, in addition to the NaNs load("AIF_1.mat"); load("inj_1.mat")...

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Extract first and last row of each subarray in a cell array
I think this works even if the first and last row of a cell are identical. load(websave('cellArray.mat','https://www.mathworks....

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Issues with subs function
I'm sure if you go through it step-by-step, or w/o assigning numbers until the end, you'll see that value of b1 is magical and a...

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