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: tdiff

Macro: diff
Description: Computes first differences (along the rows) of an array.

Usage: dx = diff(x)
Input:
x array, d1 x d2 x ... x dn
Output:
dx array, (d1-1) x d2 x ... x dn, first differences along the rows of x.

Example:
library("xplore")
randomize (0)
x = (1:4)|6
diff(x)
Result:

Contents of object y
[1,] 0
[2,] 0
[3,] 0
[4,] 0
[5,] 1

Library: xplore
See also: tdiff

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, Marlene Mueller, 970903
(C) MD*TECH Method and Data Technologies, 17.8.2000