Answered

how to plot a periodic function fro negative to positive?

Hi @Daniel Niu Are you looking for this? Edit: Made changes as per shown in your diagram. Because the amplitude is unknown, th...

how to plot a periodic function fro negative to positive?

Hi @Daniel Niu Are you looking for this? Edit: Made changes as per shown in your diagram. Because the amplitude is unknown, th...

1 month ago | 0

Answered

How to plot function f(x,y,z)=c ?

@Duong Nguyen Not how it looks. Are you expecting something like this? c = pi/2; z = @(x, y) acos(c - cos(x) + cos(y)); fsur...

How to plot function f(x,y,z)=c ?

@Duong Nguyen Not how it looks. Are you expecting something like this? c = pi/2; z = @(x, y) acos(c - cos(x) + cos(y)); fsur...

1 month ago | 0

Answered

I'm not getting the correct result for the u, i want it in degree but the ans is not right, the plot is not smooth.

To understand why it is not smooth, you need to see what causes the singularity (division-by-zero) at around . ni = 1; nt = 1....

I'm not getting the correct result for the u, i want it in degree but the ans is not right, the plot is not smooth.

To understand why it is not smooth, you need to see what causes the singularity (division-by-zero) at around . ni = 1; nt = 1....

1 month ago | 0

Answered

function that applies the parabolic interpolation method

Hi @Miftahul Jannah, Can you provide the parabolicmin.m file? help parabolicmin By the way, you should be able to visually de...

function that applies the parabolic interpolation method

Hi @Miftahul Jannah, Can you provide the parabolicmin.m file? help parabolicmin By the way, you should be able to visually de...

2 months ago | 0

| accepted

Answered

How to convert the following mathematica code to Matlab?

Hi @Md Fayaz Ahamed Identify the type of problem at first. If the problem is non-stiff, use ode45. Miscellaneous examples are p...

How to convert the following mathematica code to Matlab?

Hi @Md Fayaz Ahamed Identify the type of problem at first. If the problem is non-stiff, use ode45. Miscellaneous examples are p...

2 months ago | 0

Answered

How to find position function with acceleration function using matlab

Hi @ijsonvjksrefdsb This ordinary differential equation is a linear type. So, it is actually a kind of eigenvalue/eigenvector p...

How to find position function with acceleration function using matlab

Hi @ijsonvjksrefdsb This ordinary differential equation is a linear type. So, it is actually a kind of eigenvalue/eigenvector p...

2 months ago | 0

Answered

How do you design an adaptive PID controller/compensator for a Gimbal System? (taking in angle, accel, torque from reference)

Hi @Michael Ray Maligro If you asking how to design PID in MATLAB or Simulink, you need to have the mathematical model of the G...

How do you design an adaptive PID controller/compensator for a Gimbal System? (taking in angle, accel, torque from reference)

Hi @Michael Ray Maligro If you asking how to design PID in MATLAB or Simulink, you need to have the mathematical model of the G...

2 months ago | 0

Answered

Determine the reward value to stop training in RL agent

Hi @Haitham M. There is an option to set the StopTrainingValue.

Determine the reward value to stop training in RL agent

Hi @Haitham M. There is an option to set the StopTrainingValue.

2 months ago | 0

Answered

State Variable of the Memristor

Hi @vani If you are talking about modeling the memristor and running a simulation in MATLAB, then I think you can use ode45(). ...

State Variable of the Memristor

Hi @vani If you are talking about modeling the memristor and running a simulation in MATLAB, then I think you can use ode45(). ...

2 months ago | 0

| accepted

Answered

Problem with minimizing a LQR problem with Genetic Algorithm

Hi @gilad shaul To find through , you need to expand the Continuous-time Algebraic Riccati Equation (CARE) in terms of , and t...

Problem with minimizing a LQR problem with Genetic Algorithm

Hi @gilad shaul To find through , you need to expand the Continuous-time Algebraic Riccati Equation (CARE) in terms of , and t...

2 months ago | 1

Answered

Calculating Value of Inverse function

Hi @Johan Ahlberg How about this? syms x f(x) = (x^2)/(1 + sqrt(x)); g = finverse(f) double(g(2))

Calculating Value of Inverse function

Hi @Johan Ahlberg How about this? syms x f(x) = (x^2)/(1 + sqrt(x)); g = finverse(f) double(g(2))

2 months ago | 0

Answered

the curve in matlab

Hi @randino Not sure what you really want. Perhaps you want to get the "Validation" plot using the plotperform() command? x ...

the curve in matlab

Hi @randino Not sure what you really want. Perhaps you want to get the "Validation" plot using the plotperform() command? x ...

2 months ago | 0

Answered

How to create a transfer function with no simplification ?

Hi @Dimosthenis Leonidas, The zpk() command shows the zero/pole/gain model. (), , and () are not in pole forms. If the native ...

How to create a transfer function with no simplification ?

Hi @Dimosthenis Leonidas, The zpk() command shows the zero/pole/gain model. (), , and () are not in pole forms. If the native ...

2 months ago | 2

Answered

Problem with minimizing a LQR problem with Genetic Algorithm

Hi @gilad shaul Minimizing the norm(P) does not work because there are infinite K that can make A'*P + P*A - K'*R*K + Q exactly...

Problem with minimizing a LQR problem with Genetic Algorithm

Hi @gilad shaul Minimizing the norm(P) does not work because there are infinite K that can make A'*P + P*A - K'*R*K + Q exactly...

2 months ago | 1

| accepted

Answered

Hello, I am trying to numerically solve the following differential equation but unable to get a solution.

Hi @David M, If you are looking for a numerical solution, then the ode45() command is used. No = 1; So = 0.9999; ga...

Hello, I am trying to numerically solve the following differential equation but unable to get a solution.

Hi @David M, If you are looking for a numerical solution, then the ode45() command is used. No = 1; So = 0.9999; ga...

2 months ago | 0

Answered

cantilever beam matlab equation solve

Hi @영범 곽 The function seems to have no real roots. Please check the trigonometric function again if something is missed. k = 2...

cantilever beam matlab equation solve

Hi @영범 곽 The function seems to have no real roots. Please check the trigonometric function again if something is missed. k = 2...

2 months ago | 0

| accepted

Answered

How do you appropriately integrate time steps to a while loop program for a single stage model rocket?

Your code runs, but I suspect that something is wrong in your Rocket Model. Does the line return the pitch angle in degree or r...

How do you appropriately integrate time steps to a while loop program for a single stage model rocket?

Your code runs, but I suspect that something is wrong in your Rocket Model. Does the line return the pitch angle in degree or r...

2 months ago | 0

| accepted

Answered

Unrecognized function or variable

Hi @Aysel Alimirzayeva It requires Robust Control Toolbox, the function is introduced in R2020a. Since yours is R2019b, then I ...

Unrecognized function or variable

Hi @Aysel Alimirzayeva It requires Robust Control Toolbox, the function is introduced in R2020a. Since yours is R2019b, then I ...

2 months ago | 0

| accepted

Answered

MatLab codes for the used by forensics to determine the exact time of death.

Hi @Evalistus Simon The equation derived from Newton's Law of Cooling is given by The ambient temperature is 70°F. Suppose t...

MatLab codes for the used by forensics to determine the exact time of death.

Hi @Evalistus Simon The equation derived from Newton's Law of Cooling is given by The ambient temperature is 70°F. Suppose t...

2 months ago | 1

Answered

Write MATLAB code to solve the following the minimum problem.

Hi @Chihiro Ogino You are advised to do some reading on the PSO algorithm to understand the code. % Step 1: Initialize PSO Xm...

Write MATLAB code to solve the following the minimum problem.

Hi @Chihiro Ogino You are advised to do some reading on the PSO algorithm to understand the code. % Step 1: Initialize PSO Xm...

2 months ago | 0

Answered

L’Hospital’s rule

Probably more clearly for you if you insert the expression directly syms x limit((x + 2)/(x^2 + 3*x + 2), -2)

L’Hospital’s rule

Probably more clearly for you if you insert the expression directly syms x limit((x + 2)/(x^2 + 3*x + 2), -2)

2 months ago | 0

Answered

Help me drawing graph

Hi @현범 장 Here there is fimplicit(@(x,y) x + y - 5)

Help me drawing graph

Hi @현범 장 Here there is fimplicit(@(x,y) x + y - 5)

2 months ago | 0

| accepted

Answered

ode45 giving incorrect result

Hi @Joseph Billips There were errors in your code when you attempt to describe the dynamics of the pendulum, which is a 2nd-ord...

ode45 giving incorrect result

Hi @Joseph Billips There were errors in your code when you attempt to describe the dynamics of the pendulum, which is a 2nd-ord...

2 months ago | 0

Answered

Modelling ODE in Simulink when input multiplied by ouput

Hi @aizo zeo The given ODE cannot be modeled in the Laplace transform sense because it is a non-affine system due to the produc...

Modelling ODE in Simulink when input multiplied by ouput

Hi @aizo zeo The given ODE cannot be modeled in the Laplace transform sense because it is a non-affine system due to the produc...

2 months ago | 0

Answered

A nd B are defined, but i can't get past this line: Csum = fuzarith(x,A,B,'sum'); WHy?

Hi @Michael Check if this is what you want. The Gaussian functions on your original legend were incorrect. The fuzarith() funct...

A nd B are defined, but i can't get past this line: Csum = fuzarith(x,A,B,'sum'); WHy?

Hi @Michael Check if this is what you want. The Gaussian functions on your original legend were incorrect. The fuzarith() funct...

2 months ago | 0

Answered

3x-y+4=0 how to solve this equation in matlab

Hi @Adam The given equation can be rewritten in this familiar line equation form You can substitute any real value into ...

3x-y+4=0 how to solve this equation in matlab

Hi @Adam The given equation can be rewritten in this familiar line equation form You can substitute any real value into ...

2 months ago | 0

Answered

Why a manually made PID controller in Simulink will show a different value when compared to the default PID controller Simulink black with both having the same Kp,Ki and Kd?

Hi @Ian It's because the PID block in Simulink implements a PID controller in this form: where a first-order transfer functi...

Why a manually made PID controller in Simulink will show a different value when compared to the default PID controller Simulink black with both having the same Kp,Ki and Kd?

Hi @Ian It's because the PID block in Simulink implements a PID controller in this form: where a first-order transfer functi...

2 months ago | 0

| accepted

Answered

How to plot a polynomial?

Hi @Sarah Elena Aiko Johnson Should try like this: xi = linspace(-2, 8, 101); fend = - 2 + (6*xi) - 4*(xi.^2) + (0.5*(xi.^3))...

How to plot a polynomial?

Hi @Sarah Elena Aiko Johnson Should try like this: xi = linspace(-2, 8, 101); fend = - 2 + (6*xi) - 4*(xi.^2) + (0.5*(xi.^3))...

2 months ago | 0

| accepted

Answered

Piece-wise Functions

Let's try something very basic. t1 = -5:0.1:0; t2 = 0:0.1:10; t3 = 10:0.1:20; t4 = 20:0.1:30; t5 = 30:0.1:50; % Segment...

Piece-wise Functions

Let's try something very basic. t1 = -5:0.1:0; t2 = 0:0.1:10; t3 = 10:0.1:20; t4 = 20:0.1:30; t5 = 30:0.1:50; % Segment...

2 months ago | 0

Answered

How to solve ODE on array variables

Hi @Telema Harry Perhaps you can do this way: tspan = [0 0.1]; x0 = [2 1.5 1 0.5]; [t, x] = ode45(@odefcn, tspan, x0); ...

How to solve ODE on array variables

Hi @Telema Harry Perhaps you can do this way: tspan = [0 0.1]; x0 = [2 1.5 1 0.5]; [t, x] = ode45(@odefcn, tspan, x0); ...

2 months ago | 0

| accepted