Adding Number using for loop
26 views (last 30 days)
Show older comments
Tehreem Syed
on 6 Aug 2020
Commented: Tehreem Syed
on 6 Aug 2020
Hi,
I have 2 columns in data, time and s. I want to add all values of S when time = 1. Similarly, I want to repeat this for all values of time. I know this is a simple task, but i am not getting any output . Please help.
0 Comments
Accepted Answer
Benjamin Dassé
on 6 Aug 2020
Hi,
When time = 1 you can sum all values of S in writing :
sum(S(time==1))
So you can do for all time values
Results = zeros(numel(unique(time)),2)
j=0;
for i = unique(time)'
j=j+1;
Results(j,:) = [i sum(Y(time==i))] % [new_time new_S]
end
Regards,
More Answers (1)
KSSV
on 6 Aug 2020
Let A be your n*2 array.
t = A(:,1) ;
s = A(:,2) ;
[C,ia,ib] = unique(t) ;
N = length(C) ;
iwant = zeros(N,1) ;
for i = 1:N
iwant(i) = sum(s(ib==i)) ;
end
iwant
See Also
Categories
Find more on Loops and Conditional Statements in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!