Loop to check if 2 conditions are true for values 1:n, (1:n)+1, (1:n)+2, etc. in a vector and save ID
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Commented: Loriann Chevalier on 16 May 2022
I have a time series of daily precipitation (i.e. a vector of 365x1) and I would like to test 2 conditions :
- is the cumulative rainfall over 7 days > threshold (e.g. 10mm)
- are there at least 4 out of 7 days with precipitation (RF > 0mm)
I want to make a loop to take values 1:7, check whether the 2 conditions above are met, go to 2:8, 3:9, etc., until the first occurrence of a 7-days period for which both conditions are met. Then save the ID of the last day of the 7-days period (e.g. if the conditions are met first for 43:49, save the ID of interest is 49, I don't care about the value in the vector, only the ID).
I have no idea how to even start or what function to use, so any help is welcome.
KALYAN ACHARJYA on 16 May 2022
Start with example data, just for two weeks (generate random data), it can be possible.
Torsten on 16 May 2022
period = rainfall(i:i+6);
sum_period = sum(period);
n = numel(find(period>0));
if sum_period > threshold && n >= 4
ID = i+6;
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