Why doesn't timezone work with datetime

6 vues (au cours des 30 derniers jours)
LR
LR le 24 Août 2023
Modifié(e) : Seth Furman le 14 Sep 2023
I want to convert a posix time to a datetime for the time zone at a specific longitude. The timezone function gives you the time zone at a specific longitude, but none of the outputs are accepted by datetime.
[a,b,c] = timezone(-80)
a = 5
b = 'R'
c = '+5 R'
try
datetime(1685585049.879,'ConvertFrom','posixtime','TimeZone',a)
end
try
datetime(1685585049.879,'ConvertFrom','posixtime','TimeZone',b)
end
try
datetime(1685585049.879,'ConvertFrom','posixtime','TimeZone',c)
end

Réponse acceptée

Star Strider
Star Strider le 24 Août 2023
The timezone function is from the Mapping Toolbox, and its results are not compatible with the datetime function. The otherwise compatible timezones function does not take longitude arguments.
Try this instead —
TZ = string(fix(-80/15)) % Time Zone (-80° Longitude)
TZ = "-5"
Time = datetime(1685585049.879,'ConvertFrom','posixtime','TimeZone',TZ)
Time = datetime
31-May-2023 21:04:09
.

Plus de réponses (1)

Seth Furman
Seth Furman le 14 Sep 2023
Modifié(e) : Seth Furman le 14 Sep 2023
Adding to @Star Strider's answer:
The value of TimeZone can be an ISO 8601 character vector of the form +HH:mm or -HH:mm; for example, '+01:00', to specify a time zone that is a fixed offset from UTC.
lon = 80;
zd = timezone(lon)
zd = -5
tz = compose("%+03d:00",zd)
tz = "-05:00"
dt = datetime(1685585049.879,ConvertFrom="posixtime",TimeZone=tz)
dt = datetime
31-May-2023 21:04:09

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