How to return output argument in Matlab?

Question

I created a function to calculate a linear system with 5 unknowns (A1 to A5), which has as an output argument 'Ai' and input 'A and b' which are respectively a Matrix and Vector. The values of A and b are assigned, but I did not put here.

At the end of the function I get the Ai values (which are 5). However I need to use the Ai values outside of my function!

FOLLOWS BELOW THE FUNCTION:

function Ai = gauss(A,b)

%% dimensao da matriz. linha, coluna

[l,c]=size(A); 

%% eliminação

for i=1:l-1

for j=i+1:l;

%% definição da constante para zerar as linhas

constante=A(j,i)/A(i,i); 

for k=i+1:l;

%% operação linear para eliminar as linhas

A(j,k)=A(j,k)-constante*A(i,k); 

end

A(j,i)=0;

b(j)=b(j)-constante*b(i);

end

end  

%% Resolução do sistema

%% função Ai recebe um array de zeros

Ai=zeros(l,1);

fprintf('SOLUÇÃO DO SISTEMA:\n\n');

for i=l:-1:1;

    soma=0;

    for k=i+1:l;

        soma=soma+A(i,k)*Ai(k);

    end

    Ai(i)=(b(i)-soma)/A(i,i);

end

end

y=x^2+x;

I want to multiply each value of Ai (that is 5) by the expression below that is outside the function Gauss.

y=x^2+x;

But how to use Ai values outside the function?

Answer 1

Input and output is very simple in Matlab. But to answer you, you need to put where you are using Ai and how you’re calling your job.

After all, if you are using the function to calculate something, you need to call it and input values A and b in some way. And it will inevitably come out of the values of Ai, that you may be suppressing.

If you have doubts about how to work with Matlab, Matlab website has good features and several examples. Maybe it’s an idea to take a look before embarking on larger projects. In addition, a quick search in google returns a lot of material, but in English has much more resources