[R-sig-Geo] subset() for spatialPointsDataFrame

[MacQueen, Don]

Try

  points.df[points.df$value > 0, c('column1','column')]

(or possibly using   points.df at data$value instead of points.df$value

-Don

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 3/6/12 7:09 AM, "Johannes Radinger" <JRadinger at gmx.at> wrote:

>Hi,
>
>I just wanted to know how I have to use the
>subset() command for a SpatialPointsDataFrame correctly.
>
>I'd like to get all records of the SpatialPointsDataFrame where the
>column "value" is > 0. Furthermore I want to select only two columns of
>that dataframe with these records. The subset command would be:
>
>subset(points.df, value > 0 , select = c(column1, column2))
>
>When I do that I get following error:
>
>Error in subset.SpatialPointsDataFrame(points.df, value > 0, select =
>c(column1,  : 
>  Object 'value' not found
>
>I also tried:
>subset(points.df, points.df["value"] > 0 , select = c(column1, column2))
>
>Error in points.df["value"] > 0 :
>  Vergleich (6) ist nur f"ur atomare und Listentypen m"oglich (sorry is
>in German)...
>
>Best regards,
>Johannes
>
>-- 
>
>Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a
>
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