updating oE sign
sign
include math.e namespace math public function sign(object a)
returns 1, 0 or 1 for each element according to it being negative, zero or positive.
Parameters:
 value : an object, each atom of which will be acted upon, no matter how deeply nested.
Returns:
An object, the same shape as value. When value is an atom, the result is 1 if value is less than zero, 1 if greater and 0 if equal.
Comments:
This function may be applied to an atom or to all elements of a sequence.
For an atom, sign(x) is the same as compare(x,0).
Example 1:
i = sign(5) i is 1 i = sign(0)  i is 0 i = sign(2)  i is 1
See Also:
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