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st: Re: question about working with dates and times
From
"Joseph Coveney" <[email protected]>
To
<[email protected]>
Subject
st: Re: question about working with dates and times
Date
Tue, 27 Jul 2010 22:52:54 +0900
Paul Visintainer wrote:
Thanks, Joe. I think I get it. Rather than just specifying the interval, one
specifies the desired interval from the zero-point.
--------------------------------------------------------------------------------
In your original post, you mentioned wanting 36 hours, 14 days, etc. You can
take advantage of the -tc()- pseudofunction by treating
-tc("02jan1960 00:00:00")- as a constant, representing how many milliseconds
there are in one day. See below for the 36-h, 14-d examples.
The limitation of this tactic is illustrated as -day2- in my first reply,
namely, the increment for "3 months" depends upon which three months of the
year you're trying to span.
Joseph Coveney
. generate double day0 = tc("06oct2007 00:00:00")
.
. * 36 h
. generate double day1 = day0 + ///
> 36 / 24 * tc("02jan1960 00:00:00")
.
. * 14 days
. generate double day2 = day0 + ///
> 14 * tc("02jan1960 00:00:00")
.
. format day? %tc
.
. list day?, noobs
+--------------------------------------------------------------+
| day0 day1 day2 |
|--------------------------------------------------------------|
| 06oct2007 00:00:00 07oct2007 12:00:00 20oct2007 00:00:00 |
+--------------------------------------------------------------+
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