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Question: determination of greyscale values

• To: mathgroup at christensen.cybernetics.net
• Subject: [mg1889] Question: determination of greyscale values
• From: khansen at leland.stanford.edu (Kurt Hansen)
• Date: Sat, 12 Aug 1995 22:51:32 -0400
• Organization: Stanford University

How does Mathematica determine which greyscale values correspond to 
which numerical values when it does density plots at default settings?  
With small matrices, it seems to distribute the greyscale at a 
constant gradient between the lowest and highest numbers. However, in 
my 40x40matrix, (which has a highest value of 10), I get the same 
martix if change the value of one position from 10 to 1000.  Is the 
setting of the middle of the gradient wighted by the median of the input 
data?  If so, how? 

Holly Goodson
Department of Biochemistry
Stanford Univeristy