Home > tt2 > @qtt_tucker > diag.m

diag

PURPOSE ^

Diagonal of a matrix or diagonal matrix from a vector in QTT-Tucker

SYNOPSIS ^

function [qt]=diag(qt)

DESCRIPTION ^

Diagonal of a matrix or diagonal matrix from a vector in QTT-Tucker
   [QT]=DIAG(QT) Either makes a diagonal matrix from a vector in 
   QTT_TUCKER, or extracts a diagonal vector from a matrix


 TT-Toolbox 2.2, 2009-2012

This is TT Toolbox, written by Ivan Oseledets et al.
Institute of Numerical Mathematics, Moscow, Russia
webpage: http://spring.inm.ras.ru/osel

For all questions, bugs and suggestions please mail
ivan.oseledets@gmail.com
---------------------------

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [qt]=diag(qt)
0002 %Diagonal of a matrix or diagonal matrix from a vector in QTT-Tucker
0003 %   [QT]=DIAG(QT) Either makes a diagonal matrix from a vector in
0004 %   QTT_TUCKER, or extracts a diagonal vector from a matrix
0005 %
0006 %
0007 % TT-Toolbox 2.2, 2009-2012
0008 %
0009 %This is TT Toolbox, written by Ivan Oseledets et al.
0010 %Institute of Numerical Mathematics, Moscow, Russia
0011 %webpage: http://spring.inm.ras.ru/osel
0012 %
0013 %For all questions, bugs and suggestions please mail
0014 %ivan.oseledets@gmail.com
0015 %---------------------------
0016 
0017 
0018 d = qt.dphys;
0019 for i=1:d
0020     qt.tuck{i} = diag(qt.tuck{i});
0021 end;
0022 
0023 end

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