About Choosing MATRIX element

function[Ybus] = ybus(zdata) %first function
nl=zdata(:,1); nr=zdata(:,2); R=zdata(:,3); X=zdata(:,4); 
nbr=length(zdata(:,1)); nbus = max(max(nl), max(nr)); 
Z = R + j*X; 
y= ones(nbr,1)./Z; 
Ybus=zeros(nbus,nbus); 
for k = 1:nbr; 
    if nl(k) > 0 & nr(k) > 0 
    Ybus(nl(k),nr(k)) = Ybus(nl(k),nr(k)) - y(k); 
    Ybus(nr(k),nl(k)) = Ybus(nl(k),nr(k)); 
    end 
end 
for n = 1:nbus 
    for k = 1:nbr 
    if nl(k) == n | nr(k) == n 
    Ybus(n,n) = Ybus(n,n) + y(k); 
    else, end 
    end 
end


% From To  R     X ---these are from circuit second function
z = [ 1     2 0.12 0.16
    2  3 0.032 0.012
    3 4 0.001 0.1
    3 5 0.002 0.015];
[Ybus] = ybus(z) % bus admittance matrix

Hello,

I would like to choose every element of a matrix with for loop. I mean first I need to select 1st. element then I need to save it to a variable. Then second. thirt... etc.

The matrix that I mention has real and imaginer side in every element. Like;

[Ybus] = ybus(z) % bus admittance matrix

YBara =

3.0000 - 4.0000i -3.0000 + 4.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i

-3.0000 + 4.0000i 30.3973 -14.2740i -27.3973 +10.2740i 0.0000 + 0.0000i 0.0000 + 0.0000i

0.0000 + 0.0000i -27.3973 +10.2740i 36.2309 -85.7752i -0.1000 + 9.9990i -8.7336 +65.5022i

0.0000 + 0.0000i 0.0000 + 0.0000i -0.1000 + 9.9990i 0.1000 - 9.9990i 0.0000 + 0.0000i

0.0000 + 0.0000i 0.0000 + 0.0000i -8.7336 +65.5022i 0.0000 + 0.0000i 8.7336 -65.5022i

Who can help me? Thank you.

REgards.

Answer 1

[Deepak Meena]

Hi,

I think you want to know how you acces the array elements in a for loop. You can refer to this documentations:

Array Indexing

For loop in matlab