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Re: Raster and ColorFunctionScaling


Hi,

it is not, because the third argument of Raster[]
gives an explicit range for the color values in the
first argument. There are a lot of bitmap operations
that require an explicit rescaling and the "automatical"
height rescaling would be very confusing for bitmaps.

Regards
  Jens

David Park wrote:
> 
> Dear MathGroup,
> 
> Is there any explanation for the strange behavior of the
> ColorFunctionScaling option when used with the Raster graphics primitive.
> When set to True it simply clamps z < 0 to 0 and z > 1 to 1. But in
> ContourPlot and DensityPlot the minimum and maximum z values in the plot are
> found and then scaled to 0 and 1. It is certainly easy enough for
> Mathematica to find the minimum and maximum values in the raster array, so
> why doesn't Mathematica do the same kind of scaling with Raster? It is
> inconsistent and confusing usage.
> 
> David Park
> djmp at earthlink.net
> http://home.earthlink.net/~djmp/


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