# how can i make a general matrix?

1 view (last 30 days)
arian hoseini on 8 Jan 2022
Commented: arian hoseini on 9 Jan 2022 i asked this question many times but still have a problem....someone help me please i need answer as soon as possible...
##### 2 CommentsShowHide 1 older comment
arian hoseini on 8 Jan 2022
thats on me and im sorry for my explanation
L =[1 2 0.1 0.2 0.02
1 4 0.05 0.2 0.02
1 5 0.08 0.3 0.03
2 3 0.05 0.25 0.03
2 4 0.05 0.1 0.01
2 5 0.1 0.3 0.02
2 6 0.07 0.2 0.025
3 5 0.12 0.26 0.025
3 6 0.02 0.1 0.01
4 5 0.2 0.4 0.04
5 6 0.1 0.3 0.03]
%-------------------------------Program strat her--------------------------
nl = L(:,1); nr = L(:,2); R = L(:,3);
X = L(:,4); Bc = j*L(:,5);
nbr=length(L(:,1)); nbus = max(max(nl), max(nr));

Torsten on 8 Jan 2022
Edited: Torsten on 8 Jan 2022
function main
L = [1 2 0.1 0.2 0.02; ...
1 4 0.05 0.2 0.02; ...
1 5 0.08 0.3 0.03; ...
2 3 0.05 0.25 0.03; ...
2 4 0.05 0.1 0.01; ...
2 5 0.1 0.3 0.02; ...
2 6 0.07 0.2 0.025; ...
3 5 0.12 0.26 0.025; ...
3 6 0.02 0.1 0.01; ...
4 5 0.2 0.4 0.04; ...
5 6 0.1 0.3 0.03];
nl = L(:,1);
nr = L(:,2);
x = L(:,4);
n = numel(x);
Nb = 6;
mat = zeros(Nb,Nb);
n = numel(x);
for i = 1:Nb
for j = 1:Nb
logic = zeros(n,1);
if i==j
for k = 1:n
logic(k) = nl(k)==i || nr(k)==i;
end
else
for k = 1:n
logic(k) = (nl(k)==i && nr(k) ==j) || (nl(k)==j && nr(k)==i);
end
end
mat(i,j) = sum(x(logic==1));
end
end
mat
end
arian hoseini on 9 Jan 2022
thank u so much.

Cris LaPierre on 8 Jan 2022
arian hoseini on 8 Jan 2022
x = zeros(Nb);
for i=1:Nb
for j=1:Nb
rowsToSum = L(:,1) == i & L(:,2) == j;
x(i,j) = sum(L(rowsToSum, 4));
end
end
disp(x)
i dont expect you to write the whole code for me so help me with this...i tried the top code but i get this
0 0.2000 0 0.2000 0.3000 0
0 0 0.2500 0.1000 0.3000 0.2000
0 0 0 0 0.2600 0.1000
0 0 0 0 0.4000 0
0 0 0 0 0 0.3000
0 0 0 0 0 0
for x11 i added this % x(i) = sum(L(rowsToSum, 4));
but still not working and as you see x21 should be like x12 but...the others are like this too

R2016b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!