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LAFF/Answers/Week04/Trmv_ln_unb_var2.m
Julien Lengrand-Lambert d4dce71599 Create repo
2018-05-02 09:13:08 +02:00

51 lines
1.4 KiB
Matlab
Executable File

function [ x_out ] = Trmv_ln_unb_var2( L, x )
[ LTL, LTR, ...
LBL, LBR ] = FLA_Part_2x2( L, ...
0, 0, 'FLA_BR' );
[ xT, ...
xB ] = FLA_Part_2x1( x, ...
0, 'FLA_BOTTOM' );
while ( size( LBR, 1 ) < size( L, 1 ) )
[ L00, l01, L02, ...
l10t, lambda11, l12t, ...
L20, l21, L22 ] = FLA_Repart_2x2_to_3x3( LTL, LTR, ...
LBL, LBR, ...
1, 1, 'FLA_TL' );
[ x0, ...
chi1, ...
x2 ] = FLA_Repart_2x1_to_3x1( xT, ...
xB, ...
1, 'FLA_TOP' );
%------------------------------------------------------------%
x2 = chi1 * l21 + x2;
chi1 = lambda11 * chi1;
%------------------------------------------------------------%
[ LTL, LTR, ...
LBL, LBR ] = FLA_Cont_with_3x3_to_2x2( L00, l01, L02, ...
l10t, lambda11, l12t, ...
L20, l21, L22, ...
'FLA_BR' );
[ xT, ...
xB ] = FLA_Cont_with_3x1_to_2x1( x0, ...
chi1, ...
x2, ...
'FLA_BOTTOM' );
end
x_out = [ xT
xB ];
return