Azzera filtri
Azzera filtri

Find datetime in a vector

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Tiago Dias
Tiago Dias il 16 Ago 2019
Commentato: Tiago Dias il 16 Ago 2019
I want to find the index of two times that belong on a colum with a bunch of timedates
t1 = datetime('10-09-2018 00:00:00','Format','dd-MM-uuuu HH:mm:ss')
t2 = datetime('28-09-2018 23:59:00','Format','dd-MM-uuuu HH:mm:ss')
idx_t1 = find(t_ref==t1)
idx_t2 = find(t_ref==t2)
idx_t1 should be 1020961 and idx_t2 1048320, but the results are empty

Risposta accettata

KSSV il 16 Ago 2019
Modificato: KSSV il 16 Ago 2019
Use ismember
idx = knnsearch(datenum(t_ref),datenum(t1)) ;
dt = abs((datenum(t_ref)-datenum(t1))) ;
[val,idx] = min(dt) ;
  4 Commenti
Guillaume il 16 Ago 2019
Any idea with the other two functions doesnt work?
Because, despite your statement, neither t1 nor t2 are present within t_ref. Note that the 'Format' property has no influence on the actual content of the datetime, so if they differ at the millisecond level, == will return false, even though you're not displaying the milliseconds.
If you want to get rid of the milliseconds:
t_ref.Second = floor(t_ref.Second); %or round if you prefer rounding to the nearest second
Tiago Dias
Tiago Dias il 16 Ago 2019
oh ok, I though he would ignore the miliseconds due to the format I specified.

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