Hi Janis,
thank you for you answer.
Actually already I did exactly what you said. However, when I convert
the number of "seconds" from the first measurement (some day in July
2010) then a I get a date in the year 2050 which is impossible. The
latest date possible is 29March2011.
my value in ?seconds?: 1285038419
z <- 1285038419
as.POSIXct(z, origin="2010-07-15")
"2051-04-04 03:06:59 CEST"
any clue why I get this date?
I thank your help,
Cristabel.
On 07/29/2011 04:45 PM, Jannis wrote:
Well,if you would have had a look at ?POSIXct the documentation would
have given
you quite a comprehensive explanation of the meaning of the values of
your time vector as they are the values these POSIXct values are
actually stored in (they are seconds since 1970-01-01). Additionally
you would have been redirected to as.POSIXct() which converts all
sorts of objects to POSIXct. I would expect this function to return
your desired format if you feed it with the numeric values that
locator() returned.
HTH
Jannis
On 07/29/2011 03:40 PM, cristabel.du...@waldbau.uni-freiburg.de wrote:
Dear R-list,
I have a plot with y-axis corresponding to wind measurments
and x-axis with date-time information.
When I want to identify some extrem wind events in the
wind-curve, I use locator() to get the exact
date-information, by clicking in the points in graph I´m
interested in.
I get in the R console the x and y coordinates.
The x coordinates are not in a POSIXct format, I guess R is
returning the x coordinates in a time unit as miliseconds
or something else.
Do anyone how to get the x coordinates directly in a
POSIXct format?
Thanks in advance!
Cristabel.
Cristabel Durán Rangel. PhD Student.
Institute of Silviculture. Faculty of Forest and
Environmental Sciences. University of Freiburg.
Germany
Telf: +49 (761) 203 8604 (ofc)
„Man lernt die Physiognomie einer Landschaft desto besser
kennen, je genauer man die einzelnen Züge auffaßt, sie
untereinander vergleicht und so auf dem Wege der Analysis
den Quellen der Genüsse nachgeht, die uns das große
Naturgemälde bietet.“
Alexander von Humboldt, 1799
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