v+- ( u v -- w )
Factor handbook > The language > Numbers > Vector operations > Vector arithmetic

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Vocabulary
math.vectors

Inputs and outputs
ua sequence of numbers
va sequence of numbers
wa sequence of numbers


Word description
Adds and subtracts alternate elements of v and u component-wise. Elements at even indexes are subtracted, while elements at odd indexes are added.

Examples
USING: math.vectors prettyprint ; { 1 2 3 } { 2 3 2 } v+- .
{ -1 5 1 }


Definition


Methods