[R-sig-Geo] How to negate %in%

[Torleif Markussen Lunde]

Hi 

This (!) might work:

aa <- 1:10
bb <- 5:6

aa[!aa %in% bb]
[1]  1  2  3  4  7  8  9 10

aa[aa %in% bb]
[1] 5 6

Best wishes
Torleif


On Monday 25 May 2009 08:13:40 pm Jim Burke wrote:
> I can subset a "SpatialPolygonsDataFrame" from a
> data frame containing a smaller subset of IDs. For
> example below.
>
> smaller_sp <- large_sp [large_sp$ID %in% smaller_df$ID,]
>
> Given the above how can I do the logically opposite from
> the %in% operation and get all those IDs not %in%?
>
> I am processing two different sets of polygons (A,B) in
> a loop. Operation is seeing in center points in polys B
> fall in A. I would like to remove the spatial polygons
> that I found (B) as I traverse the geographical area.
>
> Thanks,
> Jim Burke
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo