[R] Problems with spatial data for Masterthesis

MacQueen, Don macqueen1 at llnl.gov
Fri Dec 19 19:17:34 CET 2014

The "over" function in the sp package should be able to do this for you.
One of the examples found in ?over says:

 # return the number of points in each polygon:
     sapply(over(sr, geometry(meuse), returnList = TRUE), length)

In that example, meuse contains the points and sr contains polygons,
analogous to your districts. Hopefully, when you loaded the kml file the
resulting object defines polygons.


Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550

On 12/18/14, 1:23 AM, "Christian Brodbeck" <christiano.brodii at gmail.com>

>I write my masterthesis and don't know how I can count points in a
>spatial net.
>In practical I have a data set for carsharing usage in Berlin. It
>includes the Idletime of the cars with Long/lat coordinates for the
>certain places. So if I plot those points I have something like a cloud
>of points over the area of Berlin. SoMy task is, to find out, in which
>area of Berlin is the idletime of the carsharing the logest. Therefor I
>wanted to cluster the innercity of Berlin. I loaded a kml file about the
>districts of berlin and put the "net" together with the cloud of points.
>So graphically it works and looks nice. By now I have to find out at
>wihich district shows the most idletimes.
>Do you know a package/program-codeexample which can handle this problem.
>In other words which can count the points located in the several
>I would be very thankful for your help
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

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