[R] Loop to find dates whithin dates

Eik Vettorazzi
2011-02-07T17:26:20Z

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 f?r Medizinische Biometrie und Epidemiologie
Universit?tsklinikum Hamburg-Eppendorf

Martinistr. 52
20246 Hamburg

T ++49/40/7410-58243
F ++49/40/7410-57790