[R] coordinates from locator function in POSIXct format

Jannis bt_jannis at yahoo.de
Fri Jul 29 16:45:39 CEST 2011

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.


On 07/29/2011 03:40 PM, cristabel.duran at 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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