Finding sum of all the elements in a row corresponding to an element which is less than a certain value?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Mohammad Zaved Siddiqui
il 21 Nov 2016
Commentato: Mohammad Zaved Siddiqui
il 21 Nov 2016
I have a matrix which looks like this:
[1 0 3; 9 1 5; 6 0 9; 2 4 6; 5 2 0]
I want to find the sum of all the elements in column 2 and 3 if the corresponding element in column 1 is less than 3. For example: In column 1, 1 and 2 are less than 3 so the result should be the sum of all the rest of the elements of rows corresponding to 1 and 2 and the answer should be (0+3+4+6)=13. How can I do that in Matlab 2016a?
0 Commenti
Risposta accettata
Alexandra Harkai
il 21 Nov 2016
Modificato: Alexandra Harkai
il 21 Nov 2016
a = [1 0 3; 9 1 5; 6 0 9; 2 4 6; 5 2 0];
sum(sum( a(a(:,1)<3, 2:3) ))
a(:,1)<3 created a binary vector to indicate which rows satisfy the condition, a(a(:,1)<3, 2:3) creates the resulting array of elements to sum, then sum(sum()) adds up the results in both directions.
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Logical in Help Center e File Exchange
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!