How to find the sum of duration if the consecutive row elements are the same?
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I have a table of datetime Activated and Location
e.g.
'2019-12-08 10:32:26' 'Room 1 '
'2019-12-08 10:33:32' 'Room 2'
'2019-12-08 10:34:35' 'Room 2'
'2019-12-08 10:35:09' ''Room 3'
'2019-12-08 10:36:56' 'Room 3'
'2019-12-08 10:38:24' 'Room 3'
'2019-12-08 10:40:17' 'Room 1'
'2019-12-08 10:43:06' 'Room 1'
'2019-12-08 10:44:28' 'Room 1'
'2019-12-08 10:45:28' 'Room 2'
and I have used diff(table.datetime,1,1) to return a separate duration file of duration spent in each room before the next room is activated
e.g.
'00:01:06'
'00:01:03'
'00:00:34'
'00:01:47'
'00:01:28'
'00:01:53'
'00:02:49'
'00:01:22'
'00:04:02'
'00:07:18'
Now I want to find the duration of time spent in each room, i.e. the start and end time of a repeated train of activations of a single room. E.g. time spent in room 2 would be the duration from 10:33:32 to 10:35:09 (i.e. sum of duration values of same rows in the duration file)
Is there a way to loop through the table and calculate time spent in each room?
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Antworten (1)
Stephan
am 17 Apr. 2021
Bearbeitet: Stephan
am 17 Apr. 2021
Save the durations you calculated using diff in an additional column so that the durations are correct for every row in your table. I guess the last entry would be NaN or zero or something like that.
6 Kommentare
Stephan
am 19 Apr. 2021
load('activations.mat')
load('rooms.mat')
endTime = [diff(activations); 0] + activations;
T = table(activations, endTime, room)
results in:
T =
30×3 table
activations endTime room
____________________ ____________________ __________
08-Dec-2018 00:08:24 08-Dec-2018 00:10:05 {'Room 1'}
08-Dec-2018 00:10:05 08-Dec-2018 00:13:53 {'Room 1'}
08-Dec-2018 00:13:53 08-Dec-2018 00:15:00 {'Room 1'}
08-Dec-2018 00:15:00 08-Dec-2018 00:25:00 {'Room 1'}
08-Dec-2018 00:25:00 08-Dec-2018 00:29:51 {'Room 2'}
08-Dec-2018 00:29:51 08-Dec-2018 00:30:09 {'Room 2'}
08-Dec-2018 00:30:09 08-Dec-2018 03:03:32 {'Room 1'}
08-Dec-2018 03:03:32 08-Dec-2018 03:06:56 {'Room 1'}
08-Dec-2018 03:06:56 08-Dec-2018 03:08:45 {'Room 1'}
08-Dec-2018 03:08:45 08-Dec-2018 07:21:00 {'Room 1'}
08-Dec-2018 07:21:00 08-Dec-2018 07:23:51 {'Room 1'}
08-Dec-2018 07:23:51 08-Dec-2018 07:26:40 {'Room 1'}
08-Dec-2018 07:26:40 08-Dec-2018 07:28:03 {'Room 2'}
08-Dec-2018 07:28:03 08-Dec-2018 07:28:07 {'Room 2'}
08-Dec-2018 07:28:07 08-Dec-2018 07:29:19 {'Room 3'}
08-Dec-2018 07:29:19 08-Dec-2018 07:30:06 {'Room 3'}
08-Dec-2018 07:30:06 08-Dec-2018 07:30:09 {'Room 3'}
08-Dec-2018 07:30:09 08-Dec-2018 07:32:26 {'Room 2'}
08-Dec-2018 07:32:26 08-Dec-2018 07:33:32 {'Room 4'}
08-Dec-2018 07:33:32 08-Dec-2018 08:20:55 {'Room 4'}
08-Dec-2018 08:20:55 08-Dec-2018 08:21:18 {'Room 1'}
08-Dec-2018 08:21:18 08-Dec-2018 08:23:26 {'Room 4'}
08-Dec-2018 08:23:26 08-Dec-2018 08:23:40 {'Room 4'}
08-Dec-2018 08:23:40 08-Dec-2018 08:24:45 {'Room 1'}
08-Dec-2018 08:24:45 08-Dec-2018 08:25:47 {'Room 1'}
08-Dec-2018 08:25:47 08-Dec-2018 08:26:39 {'Room 1'}
08-Dec-2018 08:26:39 08-Dec-2018 08:29:22 {'Room 4'}
08-Dec-2018 08:29:22 08-Dec-2018 08:32:21 {'Room 4'}
08-Dec-2018 08:32:21 08-Dec-2018 08:32:46 {'Room 4'}
08-Dec-2018 08:32:46 08-Dec-2018 08:32:46 {'Room 1'}
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