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# Paul

Last seen: Today Active since 2011

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Question

Can hgtransform be Used with a Constant Line Object?
This code runs fine on my machine with 2022a. Generates an error here with 2024a. Didn't see anything in the release notes to su...

3 days ago | 0 answers | 1

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Plot a vector with a given angle against the y-axis
Something like this? Note that the line won't won't resize if the axes are resized. If you want something like that, you might...

3 days ago | 0

reproduces the audio signal after sampling!!!
The Fourier transform of each of those impulse responses can be found as follows. See also this thread for related discussion. ...

3 days ago | 0

copy subplots within same figure
Hi William, Use the subplot command as shown below to get the new axes aligned with the old. The legends need to be copyobj'd a...

4 days ago | 1

| accepted

Trying to add Butterworth filter after fft to obtain only some of the original signal.
Hi Alejandro, The input to filter should be the time domain sequence to be filtered, not its Fourier transform. So I guess tha...

4 days ago | 0

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How to simulate control loop with sustained oscillation
Hi banghyun jo, Describing function analysis relies on the Nyquist plot of the open-loop system, not the closed-loop system. If...

5 days ago | 0

Matrix versus Scalar Input Into Functions Using Symbolic Toolbox
Hi Sam, syms x A = [2 4 ; 1 5] ; % Polynomial q(x) = x^2 + 2*x + 15 ; As was noted above by @Voss and @Ayush Anand and @Ni...

6 days ago | 1

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Simulating linear model, can't understand error
Hi Valeriy, Because the B matrix has one column, the input to the system is a scalar. Hence the U input to lsim should have on...

7 days ago | 0

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Why does robstab fail for systems with more than two zeros?
Hi Suleyman, Generally speaking, it's best to avoid "transfer function algebra." Instead, use model construction and interconne...

8 days ago | 0

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How to put existing figures in one figure together?
If subplot layout is acceptable, then ... % open the fig files in two new figures f1 = openfig('fig1.fig','Invisible'); f2 = ...

9 days ago | 1

block name in matlab
That looks like a Rate Transition block

9 days ago | 0

The mathematical expressions resulting from two different symbolic computations are significantly different.
Case 2 can be much simplified. Were you expecting the simplified result to be returned? clear syms a b X Y c Z K M m l; X=sy...

9 days ago | 1

| accepted

Question

When Should Generalized eig() Solver be Used for Ordinary eig() Problems?
Consider the following matrix: z = sqrt(sym(2)); z1 = sqrt(sym(3)); Asym = [-z, -z^2/z1; z1, z] It has a repeated eigenvalue...

10 days ago | 1 answer | 0

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How do I extract one point from a piecewise function?
Hi Allie, If M_xy and M_xz are sym objects, like so syms t M_xy = piecewise(t < 0, 0, t > 0, t); M_xz = piecewise(t < 0, 0, ...

10 days ago | 0

Setting the fixed-step solver to ode8 seems to work pretty well for the problem shown in the question with a fixed step of 0.01....

13 days ago | 1

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symmetric solutions of linear matrix equations
Here's an alternative using mldivide, \ that arrives at the same result for this particular problem. Is it effectively the same ...

16 days ago | 0

Convolution with a time shifted box function
Hi Nghi, Why should the output of system remain at 1 for t > 2.5? For t > 2.5, the input is 0 and so we'd expect the output to...

16 days ago | 0

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in DOA, ifft weighting vector
Hi 종영, Based on the very limited information provided I took an educated guess. %% array parameters c = 3e8; f = 3e8; % nomi...

16 days ago | 1

| accepted

How to convert Matlab figures into subplots without having to redraw the plots again in the command window?
Use copyobj to copy the axes of interest to a new figure, then arrange with subplot figure plot(rand(3)) ax0 = gca; hnew =...

16 days ago | 0

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How to correctly apply dsp.FIRFilter
The input to fir() should be a column vector. N = 40; fs = 20 * 10 ^ 9; freq = [0, 1 * 10 ^ 9, 2 * 10 ^ 9, 3 * 10 ^ 9, 5 * 10...

16 days ago | 0

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Filter audio file with FIR filter
Check out filter or filtfilt for starters ...

16 days ago | 0

how to multiply every single element in a matrix to entire of another matrix?
Here's one option to store each result in a cell array that's the same size as x x = [100,500,900,1300,1700; 120,600,1080,...

16 days ago | 1

| accepted

Set elements in center of matrix into NaN values
Not sure what diameter means in this context. But, if it can be defined in terms of row and column indices, then maybe something...

16 days ago | 0

Dictionary with key-value pair of string ---> string array?
Hi cyclist, Do you mean mapping to the string array contained inside the cell? keySet = ["Jan";"Feb";"Mar"]; valueSet = {["Ne...

16 days ago | 1

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how to use a variable in finite field
How about something along these lines? y = @(a) gf(3,8)*a; y(1) y(2)

17 days ago | 0

Convolution using non-constant kernel?
Hi goc3, filter provides significant speedup rng(42); nr = 100000; A = rand(nr,1); B = rand(nr,1); w = 100; % window lengt...

17 days ago | 0

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Fourier Analysis - Magnitude spectrum and phase shift
Hi Stefan, %% Triangle wave Fourier approximation + Phase & Magnitude Spectra %% Setting Maximum Harmonic to be used (importan...

18 days ago | 0

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Operations and differentiation with symmatrix in MATLAB... possible bug?
Hi dominik, I'm not sure what Problem 1 is refering to. I think Problem 2 can be explained as follows: clear all n = 2; A =...

19 days ago | 0