# signum

Returns an array y the same size as x. Where each element of y is:

`1`

if the corresponding element of x is greater than zero`0`

if the corresponding element of x equals zero- -
`1`

if the corresponding element of x is less than zero

Returns an array y the same size as x. Where each element of y is:

`1`

if the corresponding element of x is greater than zero`0`

if the corresponding element of x equals zero- -
`1`

if the corresponding element of x is less than zero