Name
appcoef — One Dimension Approximation Coefficent Reconstruction
Calling Sequence
A=appcoef(c,l,wname,[N])
A=appcoef(c,l,Lo_R,Hi_R,[N])
Parameters
- wname
-
: wavelet name
- A
-
: reconstructed approximation coefficient
- Lo_R
-
: lowpass synthesis filter
- Hi_R
-
: highpass syntheis filter
- c
-
: coefficent array
- l
-
: length array
- N
-
: restruction level
Description
appcoef is for extraction or reconstruction of approximation coeffient at different level after a multiple level decompostion. Extension mode is stored as a global variable and could be changed with dwtmode. If N is omitted, maximum level approximation will be obtained.
Examples
x=rand(1,100);
[C,L]=wavedec(x,3,'db2');
A2=appcoef(c,l,'db2',2);
Authors
Roger Liu and Isaac Zhi