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vectorB(n) = sum(vectorA(1:n)) without a loop
Asked by Christian Tieber
on 2 Sep 2019
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Latest activity Commented on by Christian Tieber
on 4 Sep 2019
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Accepted Answer by madhan ravi
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I would like to do:
vectorB(n) = sum(vectorA(1:n))
without a loop.
Thanks in advance
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1 Answer
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Answer by madhan ravi
on 2 Sep 2019
- 34 questions asked
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Edited by madhan ravi
on 2 Sep 2019
- 34 questions asked
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- reputation: 8,493
Accepted Answer
Perhaps you just want cumsum()
help cumsum
doc cumsum
Or you just need:
v= accumarray(n(:),n(:),[],@(x) sum(vectorA(1:x)));
Wanted = v(n);
% or
Wanted = arrayfun(@(x) sum(vectorA(1:x)),n)
1 Comment
cumsum looks good.
Thanks!
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