Cumulative sum for every 15min from 1 min timeseries data
2 次查看(过去 30 天)
显示 更早的评论
I have a precitpitation data at every 1 min interval. I want to change the timeseries to make a cumulative sum at every 15 min, in order to create a 15-min precipitation data. Which command would be the most suitable for this? Any Help?
0 个评论
采纳的回答
Jos (10584)
2014-2-17
Do you want to sum up the 15 minutes to a single number and then proceed to the next 15 minutes?
V = ceil(5*rand(33,1)) ; % some 33 arbitrary values
T = 0:numel(V)-1 ; % time stamps
interval = 15 ;
ix = 1+floor((T-T(1))/interval)
V2 = accumarray(ix(:),V(:))
isequal(V2(1),sum(V(1:interval))) % check
2 个评论
Jos (10584)
2014-2-17
Only if you define it as such! By subtracting T(1) from the time data you are sure that the indices correspond to the right indices (intervals), otherwise they might be shifted. The subtraction ensures that the first points within Interval from T(1) receive the index 1, etc ...
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 String Parsing 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!