[R] Loop to find dates whithin dates

[Eik Vettorazzi]

Hi Patrao,
you can 'merge' both datasets using the (extracted) day as indicator,
see ?merge. Then use subset.
hth.



Am 07.02.2011 15:10, schrieb patraopedro:
> 
> Hello to all,
> 
> I have two dataframes, the first with two columns sunrise and sunset (for 10
> years). Each of these columns is formatted for date time (ex: 01-Jan-2010
> 15:37:00) 
> 
> In the second data frame I have GPS information and also a date time column
> (same format ).
> 
> What I would like to do is a subset of all the rows from the second
> dataframe that occurred in day time only so between sunrise and sunset.
> There are thousands of lines from multiple GPS so date time might be
> repeated in some rows.
> 
> Any ideas how to accomplish this? 
> 
> Thanks in advance
> 
> Patrao
> 


-- 
Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf

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20246 Hamburg

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