Group: | Mathematical Functions |
Topic: | Fourier and Wavelet transforms |
See also: | fwt dwt invdwt fwtin invfwtin fwtinshift fwt2 invfwt2 |
Function: | invfwt | |
Description: | invfwt computes the Fast Wavelet Transformation of a vector. |
Usage: | x = invfwt (a, b, n, l, h) | |
Input: | ||
a | l x 2 matrix, indices and coefficients of father wavelet | |
b | (n-l) x 3 matrix, indices and coefficients of mother wavelet | |
n | integer, total amount of coefficients, has to be a power of 2 | |
l | integer, the number of coeffients of the mother wavelets | |
h | m x 1 vector, wavelet basis | |
Output: | ||
x | n x 1 vector, |
library ("wavelet") x = (0:1023)/1023 {a, b} = fwt (x, 4, daubechies4) sum (x - invfwt (a, b, 1024, 4, daubechies4))
Contents of sum [1,] 1.6205e-12
Group: | Mathematical Functions |
Topic: | Fourier and Wavelet transforms |
See also: | fwt dwt invdwt fwtin invfwtin fwtinshift fwt2 invfwt2 |