Roger, I have to get experience yet... I thought that the right way to
access the datas in Spatial*DataFrame should be through the use of
slots.
Thanks for the hint. Now things get easier! :-)
2008/3/12, Roger Bivand <[EMAIL PROTECTED]>:
> On Wed, 12 Mar 2008, G. Allegri wrote:
>
> > I'm trying to change a column name of the data slot of a
> SpatialPixelsDataFrame.
> > I've added the column this way:
> >
> >> slot(EceZKRIG0_3,"data")[,index]<-Sim_mean_approx[[2]]
> >
> > The column added is V151 (as 151 is the actual index).
> > I want to rename it, and I've tried:
> >
> >> names(slot(EceZKRIG0_3,"data")[index])<-"Mean_approx"
>
>
> The point of the Spatial*DataFrame classes is to look like GIS to GIS
> people and data.frames to data people. Isn't it easier just to say:
>
> EceZKRIG0_3$Mean_approx <- Sim_mean_approx[[2]]
>
> There is also a names()<- method, so if you wanted to change a name, you
> could do it:
>
> names(EceZKRIG0_3)[151] <- "Mean_approx"
>
> library(sp)
> data(meuse)
> coordinates(meuse) <- c("x", "y")
> class(meuse)
> names(meuse)
> meuse$s_lime <- sample(meuse$lime)
> names(meuse)
> names(meuse)[13] <- "not_slime"
> names(meuse)
>
> OK? Isn't that easier?
>
> Roger
>
>
> >
> > No errors are raised, but the column remain V151. What's wrong?
> >
> > Giovanni
> >
>
> > _______________________________________________
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> > R-sig-Geo@stat.math.ethz.ch
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >
>
>
> --
> 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: [EMAIL PROTECTED]
>
>
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