Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Library: xplore
See also: abs

Quantlet: sign
Description: Computes the sign function (0, -1, 1) for zeros, negative or positive values.

Usage: s = sign (x)
Input:
x array
Output:
s array containing signs for all values of x

Example:

library("xplore")

randomize (0)

x = normal (2, 3) ~ (0|0)

sign (x)

Result:



Contents of s

[1,]       -1        1       -1       0

[2,]       -1       -1        1       0


Library: xplore
See also: abs

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Author: TTK, 970617
(C) MD*TECH Method and Data Technologies, 21.9.2000