[R-sig-Geo] fail to use class of "SpatialPointsDataFrame"

[Edzer J. Pebesma]

zhijie zhang wrote:
> Dear friends,
>  I fail to understand and use the class of "SpatialPointsDataFrame", hope
> someone to givems some hints on it.
> For example:
>  z<-rnorm(16)  # this is attribute data
> coords<-cbind(x=c(1,1,1,2,2,2,3,3,3),y=c(1,2,3,1,2,3,1,2,3))   # this is
> coordinate data
>  How should i use SpatialPointsDataFrame to combine them and generate my
> dataset, Thanks a lot!
>
>
>
> --
> Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public
> HealthFudan UniversityTel:86-21-54237149
>
> 	[[alternative HTML version deleted]]
>
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>   
Try:

SpatialPointsDataFrame(coords, data.frame(z=z[1:9]))

Note that SpatialPointsDataFrame joins the spatial points (coords) and a
data.frame with attributes. The number of rows in the attribute table should
equal the number of spatial points, hence 1:9.
--
Edzer