Info
Cette question est clôturée. Rouvrir pour modifier ou répondre.
WHEN I RUN THIS CODE IT AGAIN AND AGAIN GIVE THIS PROBLEM THAT IS 'Index exceeds matrix dimensions.'
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
n=('enter the number of rows');
m=('enter the number of columns');
Pmin=[100 50 100];
Pmax=[600 200 400];
PopM=[];
for i = 1:n
for j = 1:m
PopM(i,j) = Pmin(j) + rand * (Pmax(j)-Pmin(j));
end
end
PopM
??? Index exceeds matrix dimensions.
0 commentaires
Réponses (1)
kjetil87
le 17 Août 2013
Modifié(e) : kjetil87
le 17 Août 2013
You are declaring PopM as
PopM=[];
Then your are telling matlab to acces element i and j of this matrix, but this matrix as the size of 0x0.
PopM(1,1)
??? Index exceeds matrix dimensions.
Instead preallocate with
zeros(n,m)
You will also get this error if m>3 in your code, since
numel(Pmin) is 3
numel(Pmax) is 3
2 commentaires
Jan
le 17 Août 2013
The assigment of PopM(1,1) is correct and works without problems, although a proper pre-allocation would be more efficient. The problem will appear for m>3 only, when the sizes of Pmin or Pmax are exceeded.
kjetil87
le 18 Août 2013
Yes , you are correct was too quick there =)
Indeed you are not accessing PopM but instead reallocating it every iteration, good you caught that one!
Cette question est clôturée.
Voir également
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!