how to store values into array/matrix with different number of rows and only one column
16 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi, how i want to store values from loop which has only 1 cols but may have different numbers rows.
For example, in 1st loop the result is
1
2
Meanwhile 2nd loop the results is
1
2
3
Thus, i want to store it as:
1 1
2 2
0 3
Is it possible? Since within the loop...the row can be any numbers.
0 commentaires
Réponse acceptée
Rik
le 6 Août 2021
Modifié(e) : Rik
le 6 Août 2021
It is best to pre-allocate your output array as close to the size you think you need, because extending a matrix hurts performance substantially.
cols=2;
est_rows=5;%estimate of the largest number of rows
result=zeros(est_rows,cols);keep_rows=0;
for col=1:2
if col==1 ,part_result=(1:2).';
elseif col==2,part_result=(1:3).';
end
keep_rows=max(keep_rows,numel(part_result));
result(1:numel(part_result),col)=part_result;
end
result((keep_rows+1):end,:)=[];%will only crop unused rows
result
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Loops and Conditional Statements 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!