How to extract latitude and longitudes from a table given the timestamp range?

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Norma
Norma 2024-6-13
回答： Steven Lord 2024-6-13
Hello, I'm currently using a time table and want to have the user give a start time and end time then store them in variables. Once given, I want to use the timetiable to access a list of latitude and longitude values given in between those times and plot it. I'm still new to MATLAB and unsure how to approach this is ui.app designer.

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回答（2 个）

Cris LaPierre
Cris LaPierre 2024-6-13
I would use isbetween to create an index of the table rows that are between the lower and upper times.
I would then use that index to extract the specific variable values I wanted from the table. See Accessing Data in Tables for this.
Steven Lord
Steven Lord 2024-6-13
Ran in:
Use a timerange object as the row index into your timetable.
Time = datetime({'12/18/2015 08:00:00';'12/18/2015 10:00:0';'12/18/2015 12:00:00';...
'12/18/2015 14:00:00';'12/18/2015 16:00:00';'12/18/2015 18:00:00'});
Temp = [37.3;39.1;42.3;45.7;41.2;39.9];
TT = timetable(Time, Temp)
TT = 6x1 timetable
Time Temp ____________________ ____ 18-Dec-2015 08:00:00 37.3 18-Dec-2015 10:00:00 39.1 18-Dec-2015 12:00:00 42.3 18-Dec-2015 14:00:00 45.7 18-Dec-2015 16:00:00 41.2 18-Dec-2015 18:00:00 39.9
R = timerange('12/18/2015 09:00 AM', '12/18/2015 05:00 PM')
R =
timetable timerange subscript: Select timetable rows with times in the half-open interval: Starting at, including: 18-Dec-2015 09:00:00 Ending at, but excluding: 18-Dec-2015 17:00:00
TT(R, :)
ans = 4x1 timetable
Time Temp ____________________ ____ 18-Dec-2015 10:00:00 39.1 18-Dec-2015 12:00:00 42.3 18-Dec-2015 14:00:00 45.7 18-Dec-2015 16:00:00 41.2

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