Vector products: Difference between revisions
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An alternative definition for cross (based on finding the determinant of a 3 by 3 matrix where one row is unit vectors) could be: |
An alternative definition for cross (based on finding the determinant of a 3 by 3 matrix where one row is unit vectors) could be: |
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<lang j>cross=: [: > [: -&.>/ .(*&.>) (<"1=i.3) , ,:&:(<"0)</lang> |
<lang j>cross=: [: > [: -&.>/ .(*&.>) (<"1=i.3) , ,:&:(<"0)</lang> |
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Implementation: |
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With an implementation of cross product, the rest of the task becomes trivial: |
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<lang j>a=: 3 4 5 |
<lang j>a=: 3 4 5 |
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b=: 4 3 5 |
b=: 4 3 5 |
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