app_hh

(PublicToolbox/regutools/app_hh.m in BrainStorm 2.0 (Alpha))

Function Synopsis

A = app_hh(A,beta,v)

Help Text

APP_HH Apply a Householder transformation.

 A = app_hh(A,beta,v)

 Applies the Householder transformation, defined by
 vector v and scaler beta, to the matrix A; i.e.
     A = (eye - beta*v*v')*A .

Cross-Reference Information

bidiag                             C:\BrainStorm_2001\PublicToolbox\regutools\bidiag.m
lanc_b                             C:\BrainStorm_2001\PublicToolbox\regutools\lanc_b.m
lsqr                               C:\BrainStorm_2001\PublicToolbox\regutools\lsqr.m
plsqr                              C:\BrainStorm_2001\PublicToolbox\regutools\plsqr.m

Listing of function C:\BrainStorm_2001\PublicToolbox\regutools\app_hh.m

function A = app_hh(A,beta,v)
%APP_HH Apply a Householder transformation.
%
% A = app_hh(A,beta,v)
%
% Applies the Householder transformation, defined by
% vector v and scaler beta, to the matrix A; i.e.
%     A = (eye - beta*v*v')*A .

% Per Christian Hansen, UNI-C, 03/11/92.

A = A - (beta*v)*(v'*A);