17 lines
223 B
PostScript
17 lines
223 B
PostScript
/dotproduct{
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/x exch def
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/y exch def
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/sum 0 def
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/i 0 def
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x length y length eq %Check if both arrays have the same length
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{
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x length{
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/sum x i get y i get mul sum add def
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/i i 1 add def
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}repeat
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sum ==
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}
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{
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-1 ==
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}ifelse
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}def
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