实用的主分量分析程序。程序中mixedsig为 n*T 阶混合数据矩阵，n为信号个数，T为采样点数, y为 m*T 阶主分量矩阵。-The practical primary component analysis program. Program mixedsig n* T Order Mixed data matrix, n is the number of signals, T is the sampling points, y is M* T stage primary component