wmulden using previous calculated parametes

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Emiliano Rosso 2017-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/334601-wmulden-using-previous-calculated-parametes

关闭： MATLAB Answer Bot 2021-8-20

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When I apply wmulden to an array A I obtain an array B with denoised signal:

   level = 4;           
   wname = 'sym2';         
   tptr  = 'heursure';  
   sorh  = 's';       
   mode  = 'asym';    
   SCAL  ='mln';     
   npc_app = 'none';
   npc_fin = 'none';
   [B, npc, nestco] = wmulden(A, level,wname,'mode',mode, npc_app, ... 
                                   npc_fin, tptr, sorh);

If I change only one of all the data in array A the calculated array B is totally different in every single data.

[n,m]=size(A);
A(n-100,1:m)=A(n-100,1:m)+rand(1,1:m)*0.1;
[B2, npc, nestco] = wmulden(A, level,wname,'mode',mode, npc_app, ... 
                                 npc_fin, tptr, sorh);

I need :

B(1:n-101,1:m) = B2(1:n-101,1:m) && B(1:n-99,1:m) = B2(1:n-99,1:m)

and

B2(1:n-100,1:m)

is correctly denoised.

I ask if is possible to use the parameters calculated previously to apply them with wmulden only to the changed data preserving the unchanged data.

Thanks!