Re: [GRASS-user] Re: Natural breaks classification

2012-05-19 Thread Luigi Ponti
On 18/05/2012 11:30, Roger Bivand wrote: Since all Spatial*DataFrame objects behave link data.frame objects, you can say: DTM- readRAST6(DTM@mapset, ignore.stderr=TRUE) DTM_class- classIntervals(DTM.df$varOfInterest, n=5, style=fisher) I apologize about my imprecise statement that a

[GRASS-user] Re: Natural breaks classification

2012-05-18 Thread Roger Bivand
Since all Spatial*DataFrame objects behave link data.frame objects, you can say: DTM- readRAST6(DTM@mapset, ignore.stderr=TRUE) DTM_class - classIntervals(DTM.df$varOfInterest, n=5, style=fisher) However, if nrow(DTM) is large, you may find that the natural breaks classifications take a lot of