Community Profile

# Birdman

##### Last seen: 10 días ago
1.099 total contributions since 2017

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

View details...

Contributions in
View by

Question

TMS320F28379D: Code Generation Error while Using CLA Task Trigger block in Simulink
Hello, I am using Launchpad F28379D in Simulink. I have a problem while generating code for a CLA Task triggered subsystem whic...

2 meses ago | 0 answers | 0

### 0

Numerical Integration from -Inf to Inf
Try the symbolic approach and consider the problem as follows: syms x F(x)=x*(x+0.1)^2*exp(2*(x+0.1)^2*3^2)*exp(-x^2); After ...

3 meses ago | 0

Helping solving two variables in an equation
Try the following: Kt=[12 -1; -1 3]; I=[1 0;0 1]; lambda1=2.8902; w1=1.7001; V1=sym('V1',[2 1]); eqn=((Kt-lambda1*I)*V1)==...

3 meses ago | 1

| accepted

Error when compiling with CLA on TI C2000 MCU in Simulink. Can't find "cla_header.h"
How did you solve this problem?

3 meses ago | 0

Looping a matrix to find determinant
Following way can be a starting point: A=randi([1 5],8267,4);%%random data for i=1:max(size(A))-3 DetVal(i)=det(A(i:i+3,1...

11 meses ago | 0

How to extract two equal maximum values at different index
index=find(A==max(A)) This should give you the indexes.

11 meses ago | 0

| accepted

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...

alrededor de 1 año ago | 1 answer | 0

### 1

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.

alrededor de 1 año ago | 0

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);

alrededor de 1 año ago | 0

| accepted

How to write time dependent exponential with simple Simulink blocks
Try this attached model.

alrededor de 1 año ago | 0

"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 año ago | 0

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

alrededor de 1 año ago | 0

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; ...

más de 1 año ago | 0

How to construct a vector from specific elements in a matrix
B=[A(1,2);A(2,3);A(3,1)]

más de 1 año ago | 1

| accepted

differentiation for a function
syms y(x) diff(diff(y,x)==x-y^2)

más de 1 año ago | 0

How to delay a boolean signal by an amount of time?
Simply, use a *Delay* block. See the attached pictures for details.

más de 1 año ago | 0

| accepted

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_...

más de 1 año ago | 0

| accepted

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

más de 1 año ago | 1

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...

más de 1 año ago | 0

| accepted

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...

más de 1 año ago | 0

| accepted

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, ...

más de 1 año ago | 0

| accepted

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(...

más de 1 año ago | 0

| accepted

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...

más de 1 año ago | 0

| accepted

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...

más de 1 año ago | 0

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)))]...

más de 1 año ago | 1

| accepted

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...

más de 1 año ago | 0

can anybody help me with the error?
Make sure that _TrainFeature_ (I assume it is a function) is located in your current working directory.

más de 1 año ago | 0

How do I perform Partial differential equation by Simulink?
You can't. Only numerical derivatives with respect to time can be calculated in Simulink.

más de 1 año ago | 0

| accepted