Answered

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 =...

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 =...

ungefär en månad ago | 0

Answered

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...

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...

ungefär 2 månader ago | 1

| accepted

Answered

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...

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...

ungefär 2 månader ago | 0

Answered

Expansion in a Fourier Series

% Problem_1 the Fourier series of the function f(x) % f(x)=0 -pi < x < 0 % f(x)=1 0 < x < pi %syms x n pi % pi=3.14; ...

Expansion in a Fourier Series

% Problem_1 the Fourier series of the function f(x) % f(x)=0 -pi < x < 0 % f(x)=1 0 < x < pi %syms x n pi % pi=3.14; ...

ungefär 2 månader ago | 0

Answered

Plot Specific Points on Nichols Chart

Hi Amaan, The input to nichols has to be an a dynamic system model. So either you have to convert AbsN and AngN to such a mode...

Plot Specific Points on Nichols Chart

Hi Amaan, The input to nichols has to be an a dynamic system model. So either you have to convert AbsN and AngN to such a mode...

ungefär 2 månader ago | 0

| accepted

Question

Answers Not Running Code?

Anyone else having trouble running code on Answers? I see it trying to run with 2024a, but get a message "Something went wrong....

ungefär 2 månader ago | 1 answer | 0

Answered

Calculating a Fourier series with MATLAB manually problem

I don't think anything is wrong with the code in the Question, at least based on visual inspection (though it's always best to u...

Calculating a Fourier series with MATLAB manually problem

I don't think anything is wrong with the code in the Question, at least based on visual inspection (though it's always best to u...

ungefär 2 månader ago | 0

| accepted

Answered

Fourier Series Curve Fitting and giving its coefficient with respect to eqaution

Hi OLuxanna, The code is attempting to implement the complex exponential Fourier series using the C_n coefficients. Let's look...

Fourier Series Curve Fitting and giving its coefficient with respect to eqaution

Hi OLuxanna, The code is attempting to implement the complex exponential Fourier series using the C_n coefficients. Let's look...

ungefär 2 månader ago | 0

Answered

How can I use allmargin() with non-unity feedback?

Hi Erik, What's the loop transfer function, L(s), from which one could compute the stability margins (having already determined...

How can I use allmargin() with non-unity feedback?

Hi Erik, What's the loop transfer function, L(s), from which one could compute the stability margins (having already determined...

ungefär 2 månader ago | 1

| accepted

Answered

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...

2 månader ago | 0

Answered

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...

2 månader ago | 1

| accepted

Answered

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...

2 månader ago | 0

| accepted

Answered

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...

2 månader ago | 0

Answered

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...

2 månader ago | 0

Answered

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 ...

2 månader ago | 0

| accepted

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...

2 månader ago | 0 answers | 0

Answered

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...

2 månader ago | 0

Answered

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?...

2 månader ago | 0

Answered

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...

2 månader ago | 0

Answered

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...

3 månader ago | 0

Answered

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...

3 månader ago | 0

Answered

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...

3 månader ago | 1

| accepted

Answered

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...

3 månader ago | 0

| accepted

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?

3 månader ago | 1 answer | 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...

3 månader ago | 1 answer | 0

Answered

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 = ...

3 månader ago | 0

| accepted

Answered

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...

3 månader ago | 0

| accepted

Answered

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...

3 månader ago | 0

Answered

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 ...

3 månader ago | 0

| accepted

Answered

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...

3 månader ago | 0