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: math
See also: plotgt orthonormal mat2rot

Quantlet: rot2mat
Description: Computes an orthonormal matrix from a set of Givens rotations.

Link:
Usage: out = rot2mat (in {, d})
Input:
in p x (p-1)/2 vector
d p x 1 vector
Output:
out p x p matrix

Example:

; loads the library math

library ("math")

randomize(0)

; loads the library xplore

library("xplore")

; generate some orthonormal matrix

x = normal(6,6)

; orthonormalize x 

o = orthonormal(x)

; compute givensrot

{out, d} = mat2rot(o)

rot = rot2mat(out, d)

; check it

d.*rot-o

Result:

gives the null matrix 


Library: math
See also: plotgt orthonormal mat2rot

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: Sigbert Klinke, 971110
(C) MD*TECH Method and Data Technologies, 21.9.2000