数据结构中螺旋矩阵、报数问题、进制转换、文本加密解密-Spiral data structure matrix, the number of reported problems, hexadecimal conversion, text encryption and decryption

任意逆矩阵程序算法，可以对通信数据加密，保密性好。-Inverse matrix algorithm any program that can encrypt the communication data, privacy is good.

Singular value decomposition takes a rectangular matrix of gene expression data (defined as A, where A is a n x p matrix) in which the n rows represents the genes, and the p columns represents the experimental conditions.