# Documentation

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# write

Write values in WPTREE fields

## Syntax

`T = write(T,'cfs',NODE,COEFS)T = write(T,'cfs',N1,CFS1,'cfs',N2,CFS2, ...)`

## Description

`T = write(T,'cfs',NODE,COEFS)` writes coefficients for the terminal node `NODE`.

`T = write(T,'cfs',N1,CFS1,'cfs',N2,CFS2, ...)` writes coefficients `CFS1, CFS2, ...` for the terminal nodes ```N1, N2, ...```.

 Caution   The coefficients values must have the suitable size. You can use `S = read(T,'sizes',NODE)` or ```S = read(T,'sizes',[N1;N2; ...])``` in order to get those sizes.

## Examples

```% Create a wavelet packet tree. load noisdopp; x = noisdopp; t = wpdec(x,3,'db3'); t = wpjoin(t,[4;5]); % Plot tree t and click the node (0,0) (see the plot function). plot(t); ```

```% Write values. sNod = read(t,'sizes',[4,5,7]); cfs4 = zeros(sNod(1,:)); cfs5 = zeros(sNod(2,:)); cfs7 = zeros(sNod(3,:)); t = write(t,'cfs',4,cfs4,'cfs',5,cfs5,'cfs',7,cfs7); % Plot tree t and click the node (0,0) (see the plot function). plot(t) ```

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