| 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 |