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: eigsm sort

Macro: eigensm
Description: Computes the eigenvalues and eigenvectors of symmetric matrices and sorts by the eigenvalues in descending order.

Usage: y = eigensm (x)
Input:
x array, p x p x d1 x d2 x ... x dn, symmetric in each layer.
Output:
y.values array, p x 1 x d1 x d2 x ... x dn, the eigenvalues.
y.vectors array, p x p x d1 x d2 x ... x dn, the normalized eigenvectors.

Note:

Example:
library("xplore")
x=#(1,3)~#(3,1) 
{values,vectors}=eigensm(x) 
Result:
Contents of values
[1,]     4
[2,]    -2 
Contents of vectors
[1,] 0.70711  0.70711 
[2,] 0.70711 -0.70711

Library: xplore
See also: eigsm sort

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: Marlene Mueller, 971110
(C) MD*TECH Method and Data Technologies, 28.6.1999