把ALIST形式的矩阵转为为稀疏矩阵,是以matlab语言进行转化的-turn alist form matriax to sparse matriax

该算法实现了基于纹理特征的稀疏表示分类，代码注释清晰，容易理解(The algorithm implements the sparse representation based on texture features, and the code is clear and easy to understand.)