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# Birdman

##### Last seen: 7 dagen ago
1.099 total contributions since 2017

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

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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 maanden ago | 0 answers | 0

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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 maanden 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 maanden 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 maanden 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 maanden ago | 0

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

11 maanden ago | 0

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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...

12 maanden 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.

ongeveer een jaar 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);

ongeveer een jaar ago | 0

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

ongeveer een jaar 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...

ongeveer een jaar ago | 0

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

ongeveer een jaar 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; ...

meer dan een jaar ago | 0

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

meer dan een jaar ago | 1

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

meer dan een jaar ago | 0

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

meer dan een jaar ago | 0

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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_...

meer dan een jaar ago | 0

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

meer dan een jaar 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...

meer dan een jaar ago | 0

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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...

meer dan een jaar ago | 0

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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, ...

meer dan een jaar ago | 0

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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(...

meer dan een jaar ago | 0

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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...

meer dan een jaar ago | 0

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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...

meer dan een jaar 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)))]...

meer dan een jaar ago | 1

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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...

meer dan een jaar 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.

meer dan een jaar ago | 0

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

meer dan een jaar ago | 1

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

meer dan een jaar ago | 0

| accepted