Get one element from each row but not the same column
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I am trying to find the sumation of matrix zero, when I choose one element from each row but different colum,
matrix 3 *3 has 6 posibility. Could you help me how to show all possiblities without repeating.
x=zeros(3,3);
temp=0;
test=zeros(3,3);
b=sum(x,1);
for i=1:3
temp=0;
r=randperm(3);
for j=1:3
if temp~=r(j)
temp=r(j);
if sum(x(i,:))==0 && b(temp)==0
x(i,temp)=1;
end
end
end
b=sum(x,1);
end
x
0 commentaires
Réponses (1)
Stephen23
le 17 Fév 2019
Modifié(e) : Stephen23
le 17 Fév 2019
All six permutations of sums selecting one value from each row:
>> N = 3;
>> A = randi(9,N,N)
A =
8 4 8
9 6 7
8 1 5
>> X = perms(1:N) + (N*(0:N-1)); % linear indices
>> B = A.';
>> sum(B(X),2)
ans =
22
18
19
18
16
19
7 commentaires
Stephen23
le 26 Fév 2019
- click on the link in my last comment.
- click on the big blue button "Download" (top right of the page).
- save the zip file anywhere.
- unzip the contents onto your MATLAB path (e.g. into the current directory).
- you are now ready to use combinator !
Voir également
Catégories
En savoir plus sur Creating and Concatenating Matrices dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!