Is it possible to optimize converting a C# array of serial times (double) to a Matlab array of datetimes?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Matthew Trahan
am 13 Aug. 2019
Kommentiert: Matthew Trahan
am 13 Aug. 2019
Here's an example of what I'm doing:
function outputArg = TimeArray(obj)
timeArray = DotnetClass.GetTimeArray(obj.DotnetArray);
count = timeArray.Length;
outputArg = NaT(1, count);
for i=1:count
netTime = timeArray(i);
matTime = datetime(netTime, "ConvertFrom", "datenum");
outputArg(i) = matTime;
end
end
I'm converting an array of DateTimes in C# to a serial date which comes across as a double. I then need to convert these to a matlab array of datetimes for plotting.
The above implementation is taking about 30 seconds for ~110k datenums. I've used cellfun and it takes about 4 times as long, so I've ruled that out.
Thanks for any help!
0 Kommentare
Akzeptierte Antwort
Steven Lord
am 13 Aug. 2019
datetime can convert an array of serial date numbers at once, and this avoids the overhead of calling datetime repeatedly.
>> D = datenum(datetime('now') + 10*randn(110000, 1));
>> timeit(@() datetime(D, 'ConvertFrom', 'datenum'))
This took a (small) fraction of a second on my machine.
2 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Calendar 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!