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

See Also

wavedec , waverec , detcoef