Angel wrote:
Is there a way to make a shading interpolation on an image plot?
Something similar to matlab 'shading interp', I think it is called Gouraud
shading.
What I want is to make a image plot look nicer. with image() it looks very
facetted, and I would like to make it look smoother.
I've tried with interp.surface() in fields package but it (obviously) makes
nan values at the borders and around nan.
The short answer is that it is not possible. The problem is that R
assumes an underlying vector graphics system rather than a raster one.
Vector systems provide flat-shaded polygons rather than interpolated
shading.
If anyone knows how to Gouraud, Phong or other smooth shading method
portably in a vector system I'd be keen to hear about it.
--
Ross Ihaka Email: [EMAIL PROTECTED]
The R Project and R Foundation
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