1.093 total contributions since 2017

Someone who is interested in Mathematics, Control and Engineering. Also, music as a hobby.

Question

Strange behavior of diff function with symbolic variables

Hello everyone, There is a strange behavior that I encountered while using diff function with symbolic variables, not functions...

3 días ago | 1 answer | 0

Answered

Assign different value of step response to a transfer function at different time intervals

You can do it with a Signal Builder. I attached the Simulink model. Take a look.

Assign different value of step response to a transfer function at different time intervals

You can do it with a Signal Builder. I attached the Simulink model. Take a look.

23 días ago | 0

Answered

how to plot constant gain with bode

To plot Bode of constant, define it as a transfer function but in the following way: Gs=tf(R1/(R1+R2),1); bode(Gs);

how to plot constant gain with bode

To plot Bode of constant, define it as a transfer function but in the following way: Gs=tf(R1/(R1+R2),1); bode(Gs);

24 días ago | 0

| accepted

Answered

How to write time dependent exponential with simple Simulink blocks

Try this attached model.

How to write time dependent exponential with simple Simulink blocks

Try this attached model.

24 días ago | 0

Answered

"solve " function returns inaccurate solutions

Try this: syms x assume(x,'real'); solx=vpasolve(x-sqrt(x+1)-sqrt(x-1)==0,x) or syms x assume(x,'real'); solx=vpa(solve(x...

"solve " function returns inaccurate solutions

Try this: syms x assume(x,'real'); solx=vpasolve(x-sqrt(x+1)-sqrt(x-1)==0,x) or syms x assume(x,'real'); solx=vpa(solve(x...

alrededor de 1 mes ago | 0

Answered

matching from multiple arrays

One way: Result=double(ref & (ref==a{1} | ref==a{2} | ref==a{3}))

matching from multiple arrays

One way: Result=double(ref & (ref==a{1} | ref==a{2} | ref==a{3}))

alrededor de 1 mes ago | 0

Answered

Just wondering how to I plot these functions into Matlab?

Try this: syms x(t) h(t) x(t)=piecewise(t>=-1 & t<=1,1,t<-1 | t>1,0) h(t)=rectangularPulse((t-1)/4) t=-5:0.01:5; ...

Just wondering how to I plot these functions into Matlab?

Try this: syms x(t) h(t) x(t)=piecewise(t>=-1 & t<=1,1,t<-1 | t>1,0) h(t)=rectangularPulse((t-1)/4) t=-5:0.01:5; ...

4 meses ago | 0

Answered

How to construct a vector from specific elements in a matrix

B=[A(1,2);A(2,3);A(3,1)]

How to construct a vector from specific elements in a matrix

B=[A(1,2);A(2,3);A(3,1)]

5 meses ago | 1

| accepted

Answered

How to delay a boolean signal by an amount of time?

Simply, use a *Delay* block. See the attached pictures for details.

How to delay a boolean signal by an amount of time?

Simply, use a *Delay* block. See the attached pictures for details.

7 meses ago | 0

| accepted

Answered

I can I do logical indexing on a column

Is it possible for a value to be smaller than -8 and greater than 8 at the same time? Check your logical operator. You need _OR_...

I can I do logical indexing on a column

Is it possible for a value to be smaller than -8 and greater than 8 at the same time? Check your logical operator. You need _OR_...

7 meses ago | 0

| accepted

Answered

Simulink write to array index

Of course it can be done. Check the attached files.

Simulink write to array index

Of course it can be done. Check the attached files.

7 meses ago | 1

Answered

NEED HELP IN MATLAB GUI FOR FOLLOWING CODE

Check the attached zip file. In screenshot, you will see how to enter x and y vectors and you will see that you obtain the resul...

NEED HELP IN MATLAB GUI FOR FOLLOWING CODE

Check the attached zip file. In screenshot, you will see how to enter x and y vectors and you will see that you obtain the resul...

7 meses ago | 0

| accepted

Answered

Can I get the formula from the result value?

You may use *Curve Fitting Toolbox* for adapting formula(or function let's say) for your input and output values. There are seve...

Can I get the formula from the result value?

You may use *Curve Fitting Toolbox* for adapting formula(or function let's say) for your input and output values. There are seve...

7 meses ago | 0

| accepted

Answered

I have a row vector consisting of 200 engine speeds. I want to feed one value at a time into an alternator block. How do I do it?

Use *From Workspace* block. Define your data at your workspace, and also define a time vector. These two vectors should be nx1, ...

I have a row vector consisting of 200 engine speeds. I want to feed one value at a time into an alternator block. How do I do it?

Use *From Workspace* block. Define your data at your workspace, and also define a time vector. These two vectors should be nx1, ...

7 meses ago | 0

| accepted

Answered

Stuck with symbolic variables

You need to also convert your numerical array into *symbolic* so that things will be possible. For instance: c=sym(c) c(...

Stuck with symbolic variables

You need to also convert your numerical array into *symbolic* so that things will be possible. For instance: c=sym(c) c(...

7 meses ago | 0

| accepted

Answered

function [CM KG]=STtosi(In,Ib) It is not working

Since you did not mention why the function is not working, it may have two reasons: - Firstly, you need to save your function...

function [CM KG]=STtosi(In,Ib) It is not working

Since you did not mention why the function is not working, it may have two reasons: - Firstly, you need to save your function...

9 meses ago | 0

| accepted

Answered

Why do I receive an error message about output arguments for my Embedded MATLAB Function in Simulink?

Simulink wants to know the initial value and size of your output at the very beginning of the simulation. Therefore, add D=0...

Why do I receive an error message about output arguments for my Embedded MATLAB Function in Simulink?

Simulink wants to know the initial value and size of your output at the very beginning of the simulation. Therefore, add D=0...

9 meses ago | 0

Answered

Summing the diagonal of a matrix "the other way"?

This can be done as follows: res=[sum(diag(fliplr(A),3)) sum(diag(fliplr(A),2)) sum(diag(fliplr(A),1)) sum(diag(fliplr(A)))]...

Summing the diagonal of a matrix "the other way"?

This can be done as follows: res=[sum(diag(fliplr(A),3)) sum(diag(fliplr(A),2)) sum(diag(fliplr(A),1)) sum(diag(fliplr(A)))]...

9 meses ago | 1

| accepted

Answered

Error states 'Subscript indices must either be real positive integers or logicals' when trying to complete this for loop?

You can not subscript *element zero* of an array. Change your for loop to for i = 1:numel(range) Ti_in(i) = Ti_in -((I...

Error states 'Subscript indices must either be real positive integers or logicals' when trying to complete this for loop?

You can not subscript *element zero* of an array. Change your for loop to for i = 1:numel(range) Ti_in(i) = Ti_in -((I...

9 meses ago | 0

Answered

can anybody help me with the error?

Make sure that _TrainFeature_ (I assume it is a function) is located in your current working directory.

can anybody help me with the error?

Make sure that _TrainFeature_ (I assume it is a function) is located in your current working directory.

9 meses ago | 0

Answered

How to generate values between 5 and 4 with difference 0.1 without subtract symbol?

5:-0.1:4

How to generate values between 5 and 4 with difference 0.1 without subtract symbol?

5:-0.1:4

9 meses ago | 1

| accepted

Answered

How do I perform Partial differential equation by Simulink?

You can't. Only numerical derivatives with respect to time can be calculated in Simulink.

How do I perform Partial differential equation by Simulink?

You can't. Only numerical derivatives with respect to time can be calculated in Simulink.

9 meses ago | 0

| accepted

Answered

What does 'y:' stand for in plot command?

It means a _dotted yellow line_. For that, you may check the documentation of *plot* command. That third input argument decides ...

What does 'y:' stand for in plot command?

It means a _dotted yellow line_. For that, you may check the documentation of *plot* command. That third input argument decides ...

9 meses ago | 0

| accepted

Answered

How to convert row to matrix with below format????

Something like this should work: A=[3 1 1 4]; Ans=zeros(max(size(A))); r=1:max(size(A)); c=A; idx=sub2ind(s...

How to convert row to matrix with below format????

Something like this should work: A=[3 1 1 4]; Ans=zeros(max(size(A))); r=1:max(size(A)); c=A; idx=sub2ind(s...

9 meses ago | 1

Answered

How to plot signal continuously?

Consider the following approach: A=randi([1 5],1,120798); %this is demo data, you will use your own data instead of this T...

How to plot signal continuously?

Consider the following approach: A=randi([1 5],1,120798); %this is demo data, you will use your own data instead of this T...

9 meses ago | 0

Answered

How to extract elements of a matrix coming as output from a simulink block?

See the attached example. I made necessary explanations on the Simulink model. Check the contents of the MATLAB Functions.

How to extract elements of a matrix coming as output from a simulink block?

See the attached example. I made necessary explanations on the Simulink model. Check the contents of the MATLAB Functions.

9 meses ago | 0

Answered

using find function and logical array

Because Z(Z==1) will produce 1 1 1 1 1 which is a new column vector generated from the initial line. ...

using find function and logical array

Because Z(Z==1) will produce 1 1 1 1 1 which is a new column vector generated from the initial line. ...

9 meses ago | 0

| accepted

Answered

When simulating the response to a specific input signal, the input data U must be a matrix with as many rows as samples in the time vector T, and as many columns as input channels.

Try the following code. By the way, I did not understand why you gave *zeros* as input, therefore I changed it with *ones* vecto...

When simulating the response to a specific input signal, the input data U must be a matrix with as many rows as samples in the time vector T, and as many columns as input channels.

Try the following code. By the way, I did not understand why you gave *zeros* as input, therefore I changed it with *ones* vecto...

9 meses ago | 0

Answered

finding all possible Kp and Kd that makes the system stable?

Define this transfer function in MATLAB command line: Gs=tf([1 2 10],[1 5 8 3 12]); and then write pidTuner(Gs) to...

finding all possible Kp and Kd that makes the system stable?

Define this transfer function in MATLAB command line: Gs=tf([1 2 10],[1 5 8 3 12]); and then write pidTuner(Gs) to...

10 meses ago | 0

| accepted