Creating a table with missing endpoints
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi, consider the matrix below:
732315 108 1.9193000 1.9193000 1.9193000 1.9193000
732315 113 1.9193000 1.9193000 1.9060000 1.9060000
732315 114 1.9058000 1.9058000 1.9058000 1.9058000
732315 115 1.9060000 1.9061000 1.9060000 1.9060000
I want to transform the matrix into the following:
732315 108 1.9193000 1.9193000 1.9193000 1.9193000
732315 109 NaN NaN NaN NaN
732315 110 NaN NaN NaN NaN
732315 111 NaN NaN NaN NaN
732315 112 NaN NaN NaN NaN
732315 113 1.9193000 1.9193000 1.9060000 1.9060000
732315 114 1.9058000 1.9058000 1.9058000 1.9058000
732315 115 1.9060000 1.9061000 1.9060000 1.9060000
Any ideas how? thanks
0 Kommentare
Akzeptierte Antwort
Peter Perkins
am 6 Apr. 2018
Those look suspiciously like datenums, circa 2005. I'm gonna take a wild guess that 108 is 01:08. I might be completely wrong. If I'm not, use a timetable, and retime:
>> X = [732315 108 1.9193000 1.9193000 1.9193000 1.9193000
732315 113 1.9193000 1.9193000 1.9060000 1.9060000
732315 114 1.9058000 1.9058000 1.9058000 1.9058000
732315 115 1.9060000 1.9061000 1.9060000 1.9060000];
>> T = array2table(X,'VariableNames',{'Date' 'Time' 'X1' 'X2' 'X3' 'X4'});
>> T.Date = datetime(T.Date,'ConvertFrom','datenum');
>> T.Time = hours(floor(T.Time/100)) + minutes(mod(T.Time,100));
>> T.TimeStamp = T.Date + T.Time;
>> T.Date = []; T.Time = [];
>> TT = table2timetable(T)
TT =
4×4 timetable
TimeStamp X1 X2 X3 X4
____________________ ______ ______ ______ ______
03-Jan-2005 01:08:00 1.9193 1.9193 1.9193 1.9193
03-Jan-2005 01:13:00 1.9193 1.9193 1.906 1.906
03-Jan-2005 01:14:00 1.9058 1.9058 1.9058 1.9058
03-Jan-2005 01:15:00 1.906 1.9061 1.906 1.906
>> TT = retime(TT,'minutely')
TT =
8×4 timetable
TimeStamp X1 X2 X3 X4
____________________ ______ ______ ______ ______
03-Jan-2005 01:08:00 1.9193 1.9193 1.9193 1.9193
03-Jan-2005 01:09:00 NaN NaN NaN NaN
03-Jan-2005 01:10:00 NaN NaN NaN NaN
03-Jan-2005 01:11:00 NaN NaN NaN NaN
03-Jan-2005 01:12:00 NaN NaN NaN NaN
03-Jan-2005 01:13:00 1.9193 1.9193 1.906 1.906
03-Jan-2005 01:14:00 1.9058 1.9058 1.9058 1.9058
03-Jan-2005 01:15:00 1.906 1.9061 1.906 1.906
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Dates and Time finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!