packet.m

老外写的小波变换的工具箱

function p = packet(d,b,n)
% packet -- Packet table indexing
%  Usage
%    p = packet(d,b,n)
%  Inputs
%    d     depth of splitting in packet decomposition
%    b     block index among 2^d possibilities at depth d
%    n     length of signal
%  Outputs
%    p     linear indices of all coeff's in that block
%

npack = 2^d;
p =  ( (b * (n/npack) + 1) : ((b+1)*n/npack ) ) ;

%
% Copyright (c) 1993. David L. Donoho
%     
    
    
 
 
%
%  Part of Wavelab Version 850
%  Built Tue Jan  3 13:20:40 EST 2006
%  This is Copyrighted Material
%  For Copying permissions see COPYING.m
%  Comments? e-mail [e-mail]