check all IDs of a spatialPolygons object

Is there a cleaner way to check all IDs of a spatialPolygons object?
I know how to do it with one:
 > slot(spol at polygons[[2]],"ID")
[1] "g2"

and for all of them I use
sapply(spol at polygons,slot,"ID")
is there something more straightforward, sort of spFIDs() (by analogy
to spChFIDs() )?

Thanks

Agus

Is there a cleaner way to check all IDs of a spatialPolygons object?
I know how to do it with one:
slot(spol at polygons[[2]],"ID")
[1] "g2"

and for all of them I use
sapply(spol at polygons,slot,"ID")
is there something more straightforward, sort of spFIDs() (by analogy
to spChFIDs() )?
row.names(spol), OK?

Roger
Thanks

Agus

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Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no
Yes!
I would have thought on that if spol where a spatialpolygonsDataFrame,
(as many sp functions for SpPolDF actually mimic functions for
dataframes, which is
great help for the memory), but in this case, spol is just a
spatialpolygons and the user
probably will not think at that.

Thanks!
Agus

2010/5/20 Roger Bivand <Roger.Bivand at nhh.no>:
On Thu, 20 May 2010, Agustin Lobo wrote:

Is there a cleaner way to check all IDs of a spatialPolygons object?
I know how to do it with one:
slot(spol at polygons[[2]],"ID")
[1] "g2"

and for all of them I use
sapply(spol at polygons,slot,"ID")
is there something more straightforward, sort of spFIDs() (by analogy
to spChFIDs() )?
row.names(spol), OK?

Roger

Thanks

Agus

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R-sig-Geo at stat.math.ethz.ch
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--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no