[Rd] using rasterImage within image

Michael Sumner mdsumner at gmail.com
Wed Feb 9 03:51:57 CET 2011


There's a problem for rasterImage when used in SDI mode in Windows,
which may be worth considering.


I had off-list emails with Duncan Murdoch and Paul Murrell about this
and they determined that it was in SDI only, and there's still no
resolution for it as far as I know.  I checked in the latest dev build
of 2.13.0 2011-02-04 r54221 just in case.

This has been in use in the derived function
image.SpatialGridDataFrame in the sp package since rasterImage was
released, the sp function incorporates a warning for users in SDI

Cheers, Mike.

On Wed, Feb 9, 2011 at 12:49 PM, Ben Bolker <bbolker at gmail.com> wrote:
>  Has anyone yet tried incorporating rasterImage into the base image()
> function?  It seems to make a *huge* difference, with
> a very small number of added/changed lines of code.  (Of course I have
> barely tested it at all.)
>  Is there any reason this *shouldn't* go into the next release?
>> source("image.R")
>> z <- matrix(runif(1e6),nrow=1000)
>> image(z)
>> image(z,useRaster=TRUE)
>  (Patch against SVN 54284 attached; people can contact me if it doesn't
> go through and they want it.)
>  Ben Bolker
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Michael Sumner
Institute for Marine and Antarctic Studies, University of Tasmania
Hobart, Australia
e-mail: mdsumner at gmail.com

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