how to shift datetime to account for daylight savings time
조회 수: 15 (최근 30일)
이전 댓글 표시
The source data I am using expresses times in Coordinated Universal Time (UTC). I need to derive a MATLAB datetime array shifted correctly for daylight savings time throughout the year. It seems to me this ought to be straightforward, but I am finding this datetime business quite confusing. I simply want to shift times by one hour to account for DST. I am in the New York time zone.
If I put a datetime array into isdst, it does not return the correct answers (I get all logical zeros).
Thanks
댓글 수: 0
채택된 답변
Star Strider
2022년 3월 24일
Also see Specify Time Zones since it appears that ‘A different time zone offset is displayed depending on whether the datetime occurs during daylight saving time.’ according to the documentation.
댓글 수: 5
Peter Perkins
2022년 3월 24일
Kevin, it looks like your retrieved_data.results is a cell array scalar structs containing POSIX times in their t field, in ms since 1970? Maybe? If round-off issues are a concern, you might consider using 'epochtime' and 'TicksPerSecond' instead of 'posixtime'.
In any case, if your code works for you, that's great. but there ought to be a way to vectorize this calculation down to something without loops, like maybe
results = [results{:}];
utc = [results.t];
dt = datetime(utc,'ConvertFrom','posixtime','TimeZone','America/New_York');
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Dates and Time에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!