[R] about image(graphics) function

[Sean Davis]

Buhard,

The simplest way to do this is to make a new function, call it 
my.image, for example, that does the reordering automatically.  Then, 
you can replace calls to image with calls to my.image.

my.image(mat,...) {
   mat2 <- mat[nrow(mat):1,]
   image(mat2,...)
}

I haven't tested the above, but that is the idea.  Note how the '...' 
allows you to pass any other parameters unchanged to image.

Hope this helps.

Sean

On Dec 29, 2004, at 5:46 AM, Olivier BUHARD wrote:

> Hi all,
>
> is it possible to modify the way a graph obtained
> through image(graphics) is filled, I mean starting
> filling the graphical matrix by row from the
> upper-left rather than by the lower-left cell... In
> many cases, it can be usefull to have a representation
> of the data spatialy corresponding to a real support,
> as it is the case with the function image(marray) from
> Bioconductor packages, which fills the graphical
> matrix by row from upper-left, but just handles
> marrayRaw or marrayNorm objects. Of course, I could
> reorder the matrix, but it's heavier than with an
> already available function if it exists...
>
> Thanks a lot for help
>
> BUHARD Olivier
>
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