Wavelet Toolbox

plot

Plot tree.

Syntax

plot(T) 
plot(T,FIG) 
FIG = plot(T) 
NEWT = plot(T,'read',FIG) 
NEWT = plot(DUMMY,'read',FIG) 

Description

plot is a graphical tree-management utility.

plot(T) plots the tree T.

The figure that contains the tree is a GUI tool. It lets you change the Node Label to Depth_Position or Index, and Node Action to Split-Merge or Visualize.

The default values are Depth_Position and Visualize.

You can click the nodes to execute the current Node Action.

plot(T,FIG) plots the tree T in the figure whose handle is FIG. This figure was already used to plot a tree, for example using the command:

FIG = plot(T) 

After some split or merge actions, you can get the new tree using its parent figure handle. The following syntax let you perform this functionality:

NEWT = plot(T,'read',FIG) 

In fact, the first argument is dummy. The most general syntax is:

NEWT = plot(DUMMY,'read',FIG) 

where DUMMY is any object parented by an NTREE object. More generally, DUMMY can be any object constructor name returning an NTREE parented object. For example:

NEWT = plot(ntree,'read',FIG) 
NEWT = plot(dtree,'read',FIG) 
NEWT = plot(wptree,'read',FIG) 

Examples

% Create a wavelet packets tree (1-D)
load noisbloc
x = noisbloc;
t = wpdec(x,2,'db2');

% Plot tree t.
plot(t)


% Change Node Label from Depth_Position to Index.


% Click the node (3). You get the following figure

.



% Change Node Action from Visualize to Split_Merge.


% Merge the node (2) and split the node (3). 
% Change Node Action from Split_Merge to Visualize.
% Click the node (7). You obtain the following figure,
% which represents the wavelet decomposition at level 3.


% Create a wavelet packets tree (2-D)
load woman2
t = wpdec2(X,1,'sym4');

% Plot tree t.
plot(t)

% Change Node Label from Depth_Position to Index.
% Click on the node (1). You get the following figure.

orthfilt

qmf