Difference between revisions of "Sign"

Latest revision as of 01:40, 29 January 2016

The sign of a number.

Returns

Math

Introduced as a built-in function in Analytica 4.2 .

In Analytica 4.1 and earlier, it was common to define Sign as a user-defined function:

Function Sign(x) := if x < 0 then -1 else if x > 0 then 1 else 0

@@ Line 1: / Line 1: @@
-''New to Analytica 4.2''
+[[Category:Math Functions]]
-= Sign(x) =
+== Sign(x) ==
 The sign of a number.
-Returns:
+Returns
-* -1 when x<0
+* -1 when «x» < 0
-* 0 when x=0
+* 0 when «x» = 0
-* 1 when x>0
+* 1 when «x» > 0
-* [[NaN]] when x is [[NaN]]  (with Warning)
+* [[NaN]] when «x» is [[NaN]]  (with Warning)
-= Library =
+== Library ==
 Math
-= Notes =
+== History ==
+Introduced as a built-in function in [[Analytica 4.2]] .
-This function was not built into Analytica until release 4.2.  It was common in 4.1 and earlier to define it as a [[User-Defined Functions|user-defined function]]:
- Function Sign(x) := if x<0 then -1 else if x>0 then 1 else 0
-= See Also =
+In Analytica 4.1 and earlier, it was common  to define Sign as a [[User-Defined Functions|user-defined function]]:
+:<code>Function Sign(x) := if x < 0 then -1 else if x > 0 then 1 else 0</code>
+== See Also ==
 * [[Abs]]