Alfredo, Thanks, this is a bug (it works for 'by', but not for 'which').
Fixed in version >= 1.9-12. Robert

On Tue, Sep 13, 2011 at 2:51 AM, alfreale <alfreale74@gmail.com> wrote:

> Hi,
>
> I've tried with the names of the column but don't work:
>
> > data_6SV_cluster
>  cluster   intercept coefficient
> 1       1 -0.04436168    1.286019
> 2       2 -0.04415990    1.283883
> 3       3 -0.04414168    1.286019
> 4       4 -0.04375406    1.280874
> 5       5 -0.04400495    1.281942
> 6       6 -0.04390901    1.282816
> > as.matrix(raster_cluster)
>     [,1] [,2] [,3]
> [1,]    1    2    3
> [2,]    4    5    6
> > colnames(data_6SV_cluster)
> [1] "cluster"     "intercept"   "coefficient"
> > subs(raster_cluster,data_6SV_cluster,which="coefficient")
> Error in `[.data.frame`(y, , c(by, which)) : undefined columns selected
> > subs(raster_cluster,data_6SV_cluster,which=3)
> class       : RasterLayer
> dimensions  : 2, 3, 6  (nrow, ncol, ncell)
> resolution  : 0.2678571, 0.2678571  (x, y)
> extent      : 99.48661, 100.2902, 2.191965, 2.727679  (xmin, xmax, ymin,
> ymax)
> coord. ref. : +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs
> +towgs84=0,0,0
> values      : in memory
> min value   : 1.280874
> max value   : 1.286019
>
>
> Thanks,
>
> Alfredo
>
>
> --
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>
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