extend.sci

小波分解源代码

function y = extend (x,par1,par2)
//performs various kinds of symmetric extension
//  Copyright Aldo I Maalouf
if par1==1 & par2==1 then
  y = [x x((length(x)-1):-1:2)];
elseif par1 == 1 & par2 == 2 then
   y = [x x((length(x)-1):-1:1)];
elseif par1 == 2 & par2 == 1
   y = [x x((length(x)):-1:2)];
elseif par1 == 2 & par2 == 2
   y = [x reverse(x)];
end

endfunction