FOCUS AREAS

Wavelet Analysis With SAS/IML Software

Wavelets are a versatile tool for understanding and analyzing data, with important applications in nonparametric modeling, pattern recognition, feature identification, data compression, and image analysis. Wavelets provide a description of your data that localizes information at a range of scales and positions. Moreover, they can be computed very efficiently, and there is an intuitive and elegant mathematical theory to guide you in applying them.

SAS/IML software provides the following subroutines for performing wavelet analysis:

 

Wavelet Analysis Subroutines

Subroutine Purpose
WAVFT computes a wavelet transform of one dimensional data
WAVGET returns requested information about a wavelet transform
WAVIFT inverts a wavelet transform after applying thresholding to the detail coefficients
WAVPRINT displays information about a wavelet transform
WAVTHRSH applies specified thresholding to the detail coefficients of a wavelet transform