Réponse apportée

How to use exp^s for a transfer function in matlab

Models with internal delays are implemented in state space form. Ts = 1/2000; s = tf('s'); Gd = exp(-1.5*s*Ts); With Gd on...

How to use exp^s for a transfer function in matlab

Models with internal delays are implemented in state space form. Ts = 1/2000; s = tf('s'); Gd = exp(-1.5*s*Ts); With Gd on...

4 mois il y a | 0

Réponse apportée

Is there a way to compute the n-th symbolic derivative of a function where n is also symbolic?

Hi Matt, I don't think so, at least not using diff syms f(x) x syms n positive real integer % Define the function for which...

Is there a way to compute the n-th symbolic derivative of a function where n is also symbolic?

Hi Matt, I don't think so, at least not using diff syms f(x) x syms n positive real integer % Define the function for which...

4 mois il y a | 1

| A accepté

Réponse apportée

gridureal samples does not match the sampled system.

Hi Mohammad, I confess that I can't explain how dss is implementing this uncertain, descriptor system. I'm particularly curious...

gridureal samples does not match the sampled system.

Hi Mohammad, I confess that I can't explain how dss is implementing this uncertain, descriptor system. I'm particularly curious...

4 mois il y a | 0

| A accepté

Réponse apportée

cosd() giving similar value for different angles

data = load('LatLong.txt'); speed_km = data(:, 1); latitude = data(:, 2); longitude = data(:, 3); The latitude is quite s...

cosd() giving similar value for different angles

data = load('LatLong.txt'); speed_km = data(:, 1); latitude = data(:, 2); longitude = data(:, 3); The latitude is quite s...

4 mois il y a | 0

Réponse apportée

Understanding FFT in MATLAB

Hi Janee, Speaking only to the Matlab side of this question, why would it expected that the rows of u1 and up be the same? Each...

Understanding FFT in MATLAB

Hi Janee, Speaking only to the Matlab side of this question, why would it expected that the rows of u1 and up be the same? Each...

4 mois il y a | 0

Réponse apportée

Typo in the nufft (R2024a) documentation?

Hi Ana, Yes, either the plot command was intended for X or the ylabel is wrong. In the context of that example, I suspect they ...

Typo in the nufft (R2024a) documentation?

Hi Ana, Yes, either the plot command was intended for X or the ylabel is wrong. In the context of that example, I suspect they ...

4 mois il y a | 0

| A accepté

Question

How Does mldivide Work for Full, Square, Full Rank, Triangular Matrix?

How does mldivide work when the input matrix A is full, square, full rank, and triangular? The doc page just say it uses a trian...

4 mois il y a | 1 réponse | 0

Réponse apportée

Plot Piecewise function graph

This line y(i) = 1./log(2)*sin(x(i)); is incorrect. The order of operations for multiplication and division is that they ar...

Plot Piecewise function graph

This line y(i) = 1./log(2)*sin(x(i)); is incorrect. The order of operations for multiplication and division is that they ar...

4 mois il y a | 0

Réponse apportée

How to use parameter callback to parameterize mask workspace?

What happens if you just enter T = 1/f; in the Initialization section and leave the f_callback blank, or delete it altogether?...

How to use parameter callback to parameterize mask workspace?

What happens if you just enter T = 1/f; in the Initialization section and leave the f_callback blank, or delete it altogether?...

4 mois il y a | 0

Réponse apportée

Inverse of a symmetric matrix consisting of submatrices is desired.

I wasn't going to post this as it didn't seem like a useful answer, but, since @Torsten raised the idea of using the block matri...

Inverse of a symmetric matrix consisting of submatrices is desired.

I wasn't going to post this as it didn't seem like a useful answer, but, since @Torsten raised the idea of using the block matri...

4 mois il y a | 0

Réponse apportée

Assumptions are not being considered in symbolic math.

Hi Nick The issue is that the code is using linsolve, which doesn't know anything about the assumptions on the m_i. Generate a...

Assumptions are not being considered in symbolic math.

Hi Nick The issue is that the code is using linsolve, which doesn't know anything about the assumptions on the m_i. Generate a...

5 mois il y a | 0

Réponse apportée

piecewise function Fourier seriers

Hi KUN, In the context of the Fourier transform, I'm not sure that the assumption on t makes sense, at least not in the context...

piecewise function Fourier seriers

Hi KUN, In the context of the Fourier transform, I'm not sure that the assumption on t makes sense, at least not in the context...

5 mois il y a | 0

Réponse apportée

want to differentiate 1+c*exp(t)/1-exp(t) which is 2*c*exp(t)/(1-exp(t))^2 and then return it to it's original form by integration using int(), understand rewrite(tanh,"exp")

Hi Joseph, I think you got the correct result, though not using what might be considered best practices syms f c t y(t) y ypri...

want to differentiate 1+c*exp(t)/1-exp(t) which is 2*c*exp(t)/(1-exp(t))^2 and then return it to it's original form by integration using int(), understand rewrite(tanh,"exp")

Hi Joseph, I think you got the correct result, though not using what might be considered best practices syms f c t y(t) y ypri...

5 mois il y a | 1

| A accepté

Réponse apportée

Problem with using mussv

Hi Ofek, N = 30; w_vec = logspace(-5,5,100); "I calculate it using the function freqresp and the resulting array has dimensio...

Problem with using mussv

Hi Ofek, N = 30; w_vec = logspace(-5,5,100); "I calculate it using the function freqresp and the resulting array has dimensio...

5 mois il y a | 0

| A accepté

Question

What Does the Symbolic Math Toolbox Mean by 0 < s When s is Complex?

syms s syms t real f = int(exp(-s*t),t,-inf,0) What does that first condition mean insofar as s is complex?

5 mois il y a | 1 réponse | 0

Question

Does the Symbolic Toolbox Support 0- and 0+ ?

syms s syms t real f = int(exp(-s*t),t,-inf,0) Is the second term in the second condition a notation for (though I'm not e...

5 mois il y a | 1 réponse | 0

Réponse apportée

Adjusting a Sawtooth Graph and getting spectrum

Do you want a triangle or a sawtooth? Assuming the former as stated in the question, use tripuls %T = 10*50; fs = 2000; t = ...

Adjusting a Sawtooth Graph and getting spectrum

Do you want a triangle or a sawtooth? Assuming the former as stated in the question, use tripuls %T = 10*50; fs = 2000; t = ...

5 mois il y a | 0

| A accepté

Réponse apportée

how to find Laplace transform of u(-t) in MATLAB?

Hi Sundaram, The function laplace implements the unilateral Laplace transform for causal signals. However, heaviside(-t) is no...

how to find Laplace transform of u(-t) in MATLAB?

Hi Sundaram, The function laplace implements the unilateral Laplace transform for causal signals. However, heaviside(-t) is no...

5 mois il y a | 0

| A accepté

Réponse apportée

How can a Simulink State Space block state be periodically reset?

i think you'll have to use an Integrator and other native blocks to implement xdot = A*x + B*u y = C*x + D*u Use the external...

How can a Simulink State Space block state be periodically reset?

i think you'll have to use an Integrator and other native blocks to implement xdot = A*x + B*u y = C*x + D*u Use the external...

5 mois il y a | 0

Réponse apportée

modred() Scaled Output

Hi Sam, I can't explain why TMW chose to change the behavior of modred. Having said that, I have some observations about your ...

modred() Scaled Output

Hi Sam, I can't explain why TMW chose to change the behavior of modred. Having said that, I have some observations about your ...

5 mois il y a | 0

| A accepté

Réponse apportée

How to get 2% and 5% settling time from simulink?

Hi Daniel, I'm interpreting your question to mean that you have a Simulink model of the system and in Simulink you stimulate th...

How to get 2% and 5% settling time from simulink?

Hi Daniel, I'm interpreting your question to mean that you have a Simulink model of the system and in Simulink you stimulate th...

5 mois il y a | 0

Réponse apportée

Zero-order hold practical differentiator offsets magnitude

Hi Greg, I don't know if this will be the complete explanation your looking for, but here goes .... Define the continuous-time...

Zero-order hold practical differentiator offsets magnitude

Hi Greg, I don't know if this will be the complete explanation your looking for, but here goes .... Define the continuous-time...

5 mois il y a | 0

| A accepté

Réponse apportée

Symbolic integration has 3 solutions based on integration variable range, how to extract one of these?

syms U_0 r Radius mom_2 = int((U_0*(1-r/Radius)^(1/7))^2*2*sym(pi)*r,r,0,Radius) One approach that just extracts the case you ...

Symbolic integration has 3 solutions based on integration variable range, how to extract one of these?

syms U_0 r Radius mom_2 = int((U_0*(1-r/Radius)^(1/7))^2*2*sym(pi)*r,r,0,Radius) One approach that just extracts the case you ...

5 mois il y a | 2

| A accepté

Réponse apportée

How to set the sample time of a discrete transfer function block to 0.005? Please tell

Hi ISHITA, TMW recommends leaving the sample time of that block as inherited. Instead, control the sample time of the signal th...

How to set the sample time of a discrete transfer function block to 0.005? Please tell

Hi ISHITA, TMW recommends leaving the sample time of that block as inherited. Instead, control the sample time of the signal th...

5 mois il y a | 0

| A accepté

Réponse apportée

Discrete-time Simulink not matching Matlab Connect()

Hi John, Check this comment for an example that shows the same open loop system obtained from the combination of connect and ge...

Discrete-time Simulink not matching Matlab Connect()

Hi John, Check this comment for an example that shows the same open loop system obtained from the combination of connect and ge...

5 mois il y a | 0

Réponse apportée

Do source blocks in Simulink have an implicit unit step function built into them?

For the top path: Y(s) = s/(s+1)*X(s) = 1/(s+1) * (s*X(s)) The differentation rule for the one-sided Laplace transform is: L(...

Do source blocks in Simulink have an implicit unit step function built into them?

For the top path: Y(s) = s/(s+1)*X(s) = 1/(s+1) * (s*X(s)) The differentation rule for the one-sided Laplace transform is: L(...

5 mois il y a | 1

| A accepté

Réponse apportée

Find the 3D components-based row of an array that most closely matchs a given vector

I think the specific solution would depend on the figure of merit for defining "closeness" of two vectors. For example, if the ...

Find the 3D components-based row of an array that most closely matchs a given vector

I think the specific solution would depend on the figure of merit for defining "closeness" of two vectors. For example, if the ...

5 mois il y a | 0

Réponse apportée

Why are subsystems highlighted in different color after simulation

Hi Neelabh, It looks like it might be due to Sample Time Colors. Go to Debug -> Information Overlays and see if the Sample Time...

Why are subsystems highlighted in different color after simulation

Hi Neelabh, It looks like it might be due to Sample Time Colors. Go to Debug -> Information Overlays and see if the Sample Time...

5 mois il y a | 0

| A accepté

Réponse apportée

Execute Matlab function in Simulink

You are correct. In Matlab, the code looks like this (actually making the call to moving_average2) t = 0:0.1:10; u = sin(t); ...

Execute Matlab function in Simulink

You are correct. In Matlab, the code looks like this (actually making the call to moving_average2) t = 0:0.1:10; u = sin(t); ...

5 mois il y a | 0

| A accepté

Réponse apportée

why am i getting the error "Incorrect number or types of inputs or outputs for function step."

Hi Salim Your code runs fine here. What version of Matlab are you using? I just changed the code to make separate plots intead...

why am i getting the error "Incorrect number or types of inputs or outputs for function step."

Hi Salim Your code runs fine here. What version of Matlab are you using? I just changed the code to make separate plots intead...

5 mois il y a | 0