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

[baptiste auguie]

I like to use this one (albeit probably not the most efficient),

`%ni%` <- Negate(`%in%`)

baptiste

On 25 May 2009, at 20:13, 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
>
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