sgn() sometimes returns a vector

RobinHankin / permutations

https://robinhankin.github.io/permutations/

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Closed RobinHankin closed 6 years ago

RobinHankin commented 6 years ago

> perms4 <- allperms(4)
> sgn(perms4[8])
[1] -1 -1

(with thanks to Stephane Laurent)