On 25.10.2010 12:55, dpender wrote:
R community,
I am trying to create an array of the time differences between datapoints
for a very large set. For some reason for 4 of the values the difference
has been calculated as NA.
Looking at the individual points two of them are "1981-03-29 01:40:00" and
"1981-03-29 02:00:00"
Note that "1981-03-29 02:00:00"
is exactly the time of a daylight saving time change and needs
declaration of a time zone.
You may want to force tz="GMT" if you think the time difference was
really 20 minutes (rather than 1:20 or -0:40 or whatever that is).
Best,
Uwe Ligges
This is the exact same format as the other points that return values of 20
mins as expected.
In such a large dataset (600,000+ entries) I don't know why only 4 would be
doing this.
Apologies for such a vague question but can anyone shed any light on what
may be wrong?
Thanks,
Doug
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