# Paul

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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

### 0

answersPlot 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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

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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answerHow 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

Simulink presenting a convergence error

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

Dynamically Make a Variable Name

Hi Summer, One option would be to use load with an output argument, which will put all of the variables the .mat file in a stru...

21 days ago | 1

| accepted

How to integrate acceleration into displacement data correctly?

The integration seems correct based on the implied initial conditions. Fs = 1000; % sampling freq. Ts = 1 / Fs; % sampling per...

21 days ago | 0