These are the source codes of the book, Frazier M W. \"An Introduction to Wavelets Through Linear Algebra\" [M]. New York: Springer, 1999. I wrote them in 2007. All the figures in the book can be reproduced by scr ipts. Enjoy it.

循环冗余校验CRC（Cyclic Redundancy Check）是由分组线性码的分支而来，其主要应用是二元码组。编码简单且误判概率很低，在通信系统中得到了广泛的应用。重点介绍了CRC校验的原理及其算法实现。-Cyclic Redundancy Check (Cyclic Redundancy Check) is a linear code from the branch, its main application is binary codes. Coding simple misjudgm

This package contains the Matlab codes implementing the ScSPM algorithm described in CVPR 09 paper "Linear Spatial Pyramid Matching using Sparse Coding for Image Classification". -This package contains the Matlab codes implementing the ScSPM algori