WFBTPUT Put node to the filterbank tree
Usage: wt = wfbtput(d,k,w,wt);
wt = wfbtput(d,k,w,wt,'force');
Input parameters:
d : Level in the tree (0 - root).
k : Index (array of indexes) of the node at level d (starting at 0).
w : Node, basic wavelet filterbank.
wt : Wavelet filterbank tree structure (as returned from
WFBTINIT).
Output parameters:
wt : Modified filterbank structure.
WFBTPUT(d,k,w,wt) puts the basic filterbank w to the filter
tree structure wt at level d and index(es) k. The output is a
modified tree structure. d and k have to specify unconnected output
of the leaf node. Error is issued if d and k points to already
existing node. For possible formats of parameter w see help of FWT.
Parameter wt has to be a structure returned by WFBTINIT.
WFBTPUT(d,k,w,wt,'force') does the same but replaces node at d and k*
if it already exists. If the node to be replaced has any children,
the number of outputs of the replacing node have to be equal to number of
outputs of the node beeing replaced.
Examples:
---------
This example shows magnitude frequency responses of a tree build from
the root:
% Initialize empty struct
wt = wfbtinit();
% Put root node to the empty struct
wt1 = wfbtput(0,0,'db8',wt);
% Connect a different nodes to both outputs of the root
wt2 = wfbtput(1,[0,1],'db10',wt1);
% Connect another nodes just to high-pass outputs of nodes just added
wt3 = wfbtput(2,[1,3],'db10',wt2);
% Add another node at level 3
wt4 = wfbtput(3,1,'db16',wt3);
% Create identical filterbanks
[g1,a1] = wfbt2filterbank(wt1,'freq');
[g2,a2] = wfbt2filterbank(wt2,'freq');
[g3,a3] = wfbt2filterbank(wt3,'freq');
[g4,a4] = wfbt2filterbank(wt4,'freq');
% Plot frequency responses of the growing tree. Linear scale
% (both axis) is used and positive frequencies only are shown.
subplot(4,1,1);
filterbankfreqz(g1,a1,1024,'plot','linabs','posfreq');
subplot(4,1,2);
filterbankfreqz(g2,a2,1024,'plot','linabs','posfreq');
subplot(4,1,3);
filterbankfreqz(g3,a3,1024,'plot','linabs','posfreq');
subplot(4,1,4);
filterbankfreqz(g4,a4,1024,'plot','linabs','posfreq');
Package: ltfat