Answered

Building symbolic expression with vars from vector

Hi ludolfusexe, It looks like the original code was attempting to use j as a index into an array, but symbolic variables are ne...

Building symbolic expression with vars from vector

Hi ludolfusexe, It looks like the original code was attempting to use j as a index into an array, but symbolic variables are ne...

ongeveer een maand ago | 1

| accepted

Answered

when i want to get magnitude of vector in command window told me that index exceeds matrix dimensions. although i write true code

Code works here v=[1 2 3 9 6] pp=v.^2 Rr=sum(pp) mag=sqrt(Rr) disp(mag) Check norm(v) Perhaps you have variable(s) named...

when i want to get magnitude of vector in command window told me that index exceeds matrix dimensions. although i write true code

Code works here v=[1 2 3 9 6] pp=v.^2 Rr=sum(pp) mag=sqrt(Rr) disp(mag) Check norm(v) Perhaps you have variable(s) named...

ongeveer een maand ago | 0

Answered

Cross-correlation in frequency domain and xcorr2 in MATLAB

Hi Shy, Assuming that the output of the xcorr2 is the expected result, it can be obtained with the changes below img1 = imread...

Cross-correlation in frequency domain and xcorr2 in MATLAB

Hi Shy, Assuming that the output of the xcorr2 is the expected result, it can be obtained with the changes below img1 = imread...

ongeveer een maand ago | 0

| accepted

Answered

how to solve this problem?

Hi Federico, According to the nlssest, the variable names in the input and output time tables have to macth the InputName and O...

how to solve this problem?

Hi Federico, According to the nlssest, the variable names in the input and output time tables have to macth the InputName and O...

ongeveer een maand ago | 1

| accepted

Answered

Difficulty in Calculating Signal Frequency with an Offset

Hi Raphael, The first point in the FFT is always the sum of the elements of the input. When the signal includes the offset, the...

Difficulty in Calculating Signal Frequency with an Offset

Hi Raphael, The first point in the FFT is always the sum of the elements of the input. When the signal includes the offset, the...

ongeveer een maand ago | 0

| accepted

Answered

I am getting different values of fft for the same variable as demonstrated by a simple example below...

I think you were expecting ES be equal to the first column of EF. If desired for fftshift to work along a specific dimension of...

I am getting different values of fft for the same variable as demonstrated by a simple example below...

I think you were expecting ES be equal to the first column of EF. If desired for fftshift to work along a specific dimension of...

ongeveer 2 maanden ago | 0

Answered

Non-Negative Solution with Integrator in Simulink

Hi Rajmohan, Do the parameters Limit Output along with Upper and Lower Saturation Limit do what's needed? Integrator

Non-Negative Solution with Integrator in Simulink

Hi Rajmohan, Do the parameters Limit Output along with Upper and Lower Saturation Limit do what's needed? Integrator

ongeveer 2 maanden ago | 1

| accepted

Answered

Getting different outputs from indexing and graphically.How do I verify this indexing value?..

L=10; n=1.45; Omega=1.020663297455751e+11; GAMMAb=3.590391604102621e+08; c=2.9979e8; dt=6e-12; %time increment T=1...

Getting different outputs from indexing and graphically.How do I verify this indexing value?..

L=10; n=1.45; Omega=1.020663297455751e+11; GAMMAb=3.590391604102621e+08; c=2.9979e8; dt=6e-12; %time increment T=1...

ongeveer 2 maanden ago | 0

| accepted

Answered

I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency

The code has fs = 80*fmax; but the TA vector is space by dt, so fs should be fs = 1/dt;

I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency

The code has fs = 80*fmax; but the TA vector is space by dt, so fs should be fs = 1/dt;

ongeveer 2 maanden ago | 0

Answered

Are polyshape vertices preserved reliably without floating point errors?

Hi Matt, The doc pages for intersect, union, subtract, and xor all show a second output (ShapeID) that indicates if a vertex i...

Are polyshape vertices preserved reliably without floating point errors?

Hi Matt, The doc pages for intersect, union, subtract, and xor all show a second output (ShapeID) that indicates if a vertex i...

ongeveer 2 maanden ago | 1

| accepted

Answered

I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency

fmax=1e9; %maximun frequency of the signal fs=60*fmax; ts=1/fs; %time increment T=10e-9; ...

I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency

fmax=1e9; %maximun frequency of the signal fs=60*fmax; ts=1/fs; %time increment T=10e-9; ...

ongeveer 2 maanden ago | 0

| accepted

Answered

I get a robust controller result using musyn that is empty; "Krob = [ ]".

Hi Peter, My compliments on the quality of and effort put into this post! Based on only a quick inspection, I have the followi...

I get a robust controller result using musyn that is empty; "Krob = [ ]".

Hi Peter, My compliments on the quality of and effort put into this post! Based on only a quick inspection, I have the followi...

ongeveer 2 maanden ago | 0

| accepted

Answered

Why does my Transfer function overshoots

Define the plant zeros = roots([0.075, 1, 1]); poles = roots([1, 3, 5, 0]); Gs = zpk(zeros, poles,1); As was pointed out by ...

Why does my Transfer function overshoots

Define the plant zeros = roots([0.075, 1, 1]); poles = roots([1, 3, 5, 0]); Gs = zpk(zeros, poles,1); As was pointed out by ...

ongeveer 2 maanden ago | 1

| accepted

Answered

different color to plot

There may be fancy way to do it with a single line (or other type of) object, but it's easy to do it with two t = 0:.01:1; y =...

different color to plot

There may be fancy way to do it with a single line (or other type of) object, but it's easy to do it with two t = 0:.01:1; y =...

ongeveer 2 maanden ago | 0

| accepted

Answered

How to fix conjugated chirp signal frequency shift in spectrogram

Conjugation in the time domain corresponds to reversal and conjugation in the frequency domain. To get a basic idea of what's g...

How to fix conjugated chirp signal frequency shift in spectrogram

Conjugation in the time domain corresponds to reversal and conjugation in the frequency domain. To get a basic idea of what's g...

ongeveer 2 maanden ago | 0

Answered

How to change frequency range doubling of Complex-valued Chirp Signal Spectrogram to match the Real-Valued Chirp Spectrogram

No, it appears there's no way to change that if you want to have spectrogram make the plot. Can use ylim to alter the plot afte...

How to change frequency range doubling of Complex-valued Chirp Signal Spectrogram to match the Real-Valued Chirp Spectrogram

No, it appears there's no way to change that if you want to have spectrogram make the plot. Can use ylim to alter the plot afte...

ongeveer 2 maanden ago | 0

| accepted

Answered

why is NaN not of 'NaN type' in Simulink?

It looks like the block labeled "assertion1" is a Compare To Constant block. Instead use a Relational Operator block, which sup...

why is NaN not of 'NaN type' in Simulink?

It looks like the block labeled "assertion1" is a Compare To Constant block. Instead use a Relational Operator block, which sup...

ongeveer 2 maanden ago | 2

| accepted

Answered

Dynamically generate a simulink block

This doc page Dynamic Masked Subsystem is probably what you're looking for. Not sure if the number of inputs or outputs can be c...

Dynamically generate a simulink block

This doc page Dynamic Masked Subsystem is probably what you're looking for. Not sure if the number of inputs or outputs can be c...

ongeveer 2 maanden ago | 0

Answered

Aerodynamic forces and moments

The doc page Aerodynamic Forces and Moments states that the outputs of the block are: Port_1 — Aerodynamic forces Aerodynamic ...

Aerodynamic forces and moments

The doc page Aerodynamic Forces and Moments states that the outputs of the block are: Port_1 — Aerodynamic forces Aerodynamic ...

ongeveer 2 maanden ago | 0

Answered

What's the correct syntax to set-up discrete convolution ?

The variable B contains one or more NaN values. Use isnan to find which ones and then review the the corresponding inputs to be...

What's the correct syntax to set-up discrete convolution ?

The variable B contains one or more NaN values. Use isnan to find which ones and then review the the corresponding inputs to be...

ongeveer 2 maanden ago | 0

Answered

How to interpret the amplitude of impulse() results

It sounds like the code needs to account for the difference between the convolution sum, as computed by conv, and the convolutio...

How to interpret the amplitude of impulse() results

It sounds like the code needs to account for the difference between the convolution sum, as computed by conv, and the convolutio...

ongeveer 2 maanden ago | 0

Answered

Cannot compute the root locus of models with complex data

Well, you can always loop through values of K and for each value of K solve for s that satisfies den(s) + K*num(s) = 0 and plo...

Cannot compute the root locus of models with complex data

Well, you can always loop through values of K and for each value of K solve for s that satisfies den(s) + K*num(s) = 0 and plo...

ongeveer 2 maanden ago | 0

Answered

How to make double array representation as complex array with null imaginary number ?

In general, use complex A = rand(2); C = complex(A,0) If you have multiple real arrays stored in cells of a cell array, you c...

How to make double array representation as complex array with null imaginary number ?

In general, use complex A = rand(2); C = complex(A,0) If you have multiple real arrays stored in cells of a cell array, you c...

ongeveer 2 maanden ago | 1

Answered

Running main model with fixed step solver and subsystem with variable step solver

R2022a introduced the concept of a "Local Solver" when using referenced models, which might be what you're looking for. This blo...

Running main model with fixed step solver and subsystem with variable step solver

R2022a introduced the concept of a "Local Solver" when using referenced models, which might be what you're looking for. This blo...

ongeveer 2 maanden ago | 0

Answered

How to import multiple .mat files to workspace?

Why use the -ascii option to load a .mat file? If that's not the problem, please edit your question by copy/pasting the entire e...

How to import multiple .mat files to workspace?

Why use the -ascii option to load a .mat file? If that's not the problem, please edit your question by copy/pasting the entire e...

ongeveer 2 maanden ago | 0

Answered

how to compute duration of the signal

If a Matlab vector x is a subsequence of a discrete-time signal x[n], and if it's assumed that x[n] = 0 for all values of n outs...

how to compute duration of the signal

If a Matlab vector x is a subsequence of a discrete-time signal x[n], and if it's assumed that x[n] = 0 for all values of n outs...

ongeveer 2 maanden ago | 0

Answered

How to manually simulate linear system without lsim

Hi Valeriy, As indicated, the system in question is a differential equation model of a continuous-time sytem. This line of co...

How to manually simulate linear system without lsim

Hi Valeriy, As indicated, the system in question is a differential equation model of a continuous-time sytem. This line of co...

ongeveer 2 maanden ago | 0

| accepted

Answered

Identified linear system contribution of input is zero

The commands do influence the position of the motor through the dynamics as described by the differential equation. The output o...

Identified linear system contribution of input is zero

The commands do influence the position of the motor through the dynamics as described by the differential equation. The output o...

ongeveer 2 maanden ago | 0

| accepted

Answered

Comparing coefficients and solving equation

syms x a b eqn = x^2 + 2*x + 5 == (b+4*a)*x^2 + (5*a+b)*x + (-b+2*a) cleft = coeffs(lhs(eqn),x,'all') cright = coeffs(rhs(eqn...

Comparing coefficients and solving equation

syms x a b eqn = x^2 + 2*x + 5 == (b+4*a)*x^2 + (5*a+b)*x + (-b+2*a) cleft = coeffs(lhs(eqn),x,'all') cright = coeffs(rhs(eqn...

ongeveer 2 maanden ago | 0

Answered

reproduces the audio signal after sampling!!!

Hi Vu, I wasn't familiar with derivative sampling, or generalized sampling, until I saw your post. After a bit of reading, mayb...

reproduces the audio signal after sampling!!!

Hi Vu, I wasn't familiar with derivative sampling, or generalized sampling, until I saw your post. After a bit of reading, mayb...

ongeveer 2 maanden ago | 1