R help - Aug 2003 - The desire for prettier and cheaper images ...

This might be easy (but I didn't find an answer in the archives).

I'm trying to make nice looking images (using image()). 

To make them look nice (not jagged), it usually takes me at least 100x100
points. This can be slow for frequent redraws.

Is there a smarter (less point intensive) way? 

I was thinking in terms of hexabins, for example, which for much less jagged
looking regions, or of an option to image ( or a variation) which internally
increases the grid.

Any help welcome. Thanks in advance.


Christian Ritter
Functional Specialist Statistics
Shell Coordination Centre S.A.
Monnet Centre International Laboratory, Avenue Jean Monnet 1, B-1348
Louvain-La-Neuve, Belgium

Tel: +32 10 477  349 Fax: +32 10 477 219
Email: christian.ritter@shell.com
Internet: http://www.shell.com/chemicals


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>>>>> "ChRi" == Ritter, Christian C MCIL-CTGAS
<christian.ritter at shell.com>
>>>>>     on Wed, 13 Aug 2003 11:49:03 +0200 writes:
    ChRi> This might be easy (but I didn't find an answer in the
archives).
    ChRi> I'm trying to make nice looking images (using image()). 

    ChRi> To make them look nice (not jagged), it usually takes
    ChRi> me at least 100x100 points. This can be slow for
    ChRi> frequent redraws.

and also for (postscript) printing.
For true image data, it would be nice to have "true pixel-map"
graphics as part of the basic graphic engine, but I'm not really
competent here


    ChRi> Is there a smarter (less point intensive) way? 

    ChRi> I was thinking in terms of hexabins, for example,
    ChRi> which for much less jagged looking regions, or of an
    ChRi> option to image ( or a variation) which internally
    ChRi> increases the grid.

    ChRi> Any help welcome. Thanks in advance.

There's the "hexbin" package from Bioconductor for hexagonal bin
plots -- which really does help for some of the problems you mention.

Martin Maechler <maechler at stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><