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Raster
Raster[
,
, ... 
, ... 
] is a two-dimensional graphics primitive which represents a rectangular array of gray cells.
Raster[
array
,
ColorFunction
->
f
] specifies that each cell should be rendered using the graphics directives obtained by applying the function f to the cell value  .
Raster[
array
,
ColorFunction
->
Hue] generates an array in which cell values are specified by hues.
If array has dimensions 
m
,
n
 , then Raster[
array
] is assumed to occupy the rectangle Rectangle[
0,
0
,
m
,
n
].
Raster[
array
,
xmin
,
ymin
,
xmax
,
ymax
] specifies that the raster should be taken instead to fill the rectangle Rectangle[
xmin
,
ymin
,
xmax
,
ymax
].
Scaled and Offset can be used to specify the coordinates for the rectangle.
Raster[
array
,
rect
,
zmin
,
zmax
] specifies that cell values should be scaled so that zmin corresponds to 0 and zmax corresponds to 1. Cell values outside this range are clipped.
See the Mathematica book: Section 2.9.2, Section 2.9.2.
See also: RasterArray, DensityGraphics, GraphicsArray.
Further Examples
This uses an array of values as gray levels in a raster.
Evaluate the cell to see the graphic.
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