Matlab中的基本数据类型是向量和矩阵，所以很自然地，信号处理工具箱中的信号也用向量或矩阵表示。列向量和行向量表示单通道信号，矩阵表示多通道信号，矩阵中的每一列表示一个通道。-The basic data types in Matlab is a vector and matrix, so naturally, Signal Processing Toolbox is also used in the signal vector or matrix. Column vector and row vector and single-channel signal, matrix multi-channel signal, a matrix each column represents a channel.