I've the following timetable in Matlab:
intersectionPoints =
10×1 timetable
Timestamp Value
____________________ ______
01-Feb-2016 00:00:00 1.0848
01-Feb-2016 01:00:00 1.0847
01-Feb-2016 04:00:00 1.0848
02-Feb-2016 14:07:44 1.0914
02-Feb-2016 17:21:36 1.0916
03-Feb-2016 01:49:18 1.0917
03-Feb-2016 07:18:43 1.0919
04-Feb-2016 00:53:20 1.1088
04-Feb-2016 04:18:16 1.1097
04-Feb-2016 21:38:10 1.1199
I've also the following timedate:
checkDate = datetime("03-Feb-2016 01:49:20")
checkDate =
datetime
03-Feb-2016 01:49:20
I want to retrieve from intersectionPoints timetable the rows that are the previous one and the next one to specific timestamp. In my specific case I need to retrieve thosw two points:
res =
2×1 timetable
Timestamp Value
____________________ ______
03-Feb-2016 01:49:18 1.0917
03-Feb-2016 07:18:43 1.0919
res is a timetable with two elements. These are the two nearest point of intersectionPoints to checkDate, in the past and in the future related to checkDate. I can loop over all timestamp value and check them manually, but it's not efficient (my timetables are big). I can also perform a manual binary search to those elements, but I'd like to know if there's a built-in or more simple way to search for those two values.
How can I find timetable values that are next to a defined one?
The cool thing about MATLAB is that it was created for engineers and it is supposed to work as non-informatics expect. So simply find the first (find(...,1)) element which is > than your checkDate:
time = [datetime('yesterday')
datetime('today')
datetime('tomorrow')];
checkDate = datetime('now');
Tbl = timetable(time,(1:length(time)).');
idx = find(Tbl.time > checkDate ,1);
res = Tbl(idx-1:idx,:)