R help - Sep 2013 - Combining rasters

Hi everyone.

I would like to know if it is possible to combine rasters in R to form a
"collage".

For example, I would like to place 2 copies of the R logo side by side.


r = raster(system.file("external/rlogo.grd", package =
"raster"))



After reading the help file (maybe I missed it) I did not find a way to do it.

Any help would be appreciated.

Sincerely,
Phil

[Probably an R-Sig-geo question...]



On Fri, Sep 6, 2013 at 3:57 PM, philippe massicotte
<pmassicotte at hotmail.com> wrote:
> Hi everyone.
>
> I would like to know if it is possible to combine rasters in R to form a
"collage".
>
> For example, I would like to place 2 copies of the R logo side by side.
>
>
> r = raster(system.file("external/rlogo.grd", package =
"raster"))
 Convert to matrix, cbind, convert to raster:

  r2 = raster(cbind(as.matrix(r),as.matrix(r)))
  plot(r2)

If you want to preserve the x and y scale somehow then you need to
think about exactly where you are putting the second r and set xmx,
ymx xmn, ymn when you construct the new raster.

Barry