aparler/RosettaCodeData
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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
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USING: arrays kernel math math.matrices math.vectors ;
: rgb>gray ( matrix -- new-matrix )
[ { 0.2126 0.7152 0.0722 } vdot >integer ] matrix-map ;
: gray>rgb ( matrix -- new-matrix )
[ dup dup 3array ] matrix-map ;