替代数据生成算法 surrogates

代码说明：

  替代数据生成算法。包括常用的随机相位法(shuffle.m and surrogate.m)，周期随机相位法(cycleshuffle.m)和PPS算法(pps.m and findrho.m).(Surrogate data algorithms, including the usual approaches (shuffle.m and surrogate.m), the cycle shuffle version (cycleshuffle.m) and the PPS algorithm (pps.m and findrho.m). )

文件列表：

surrogates
..........\.DS_Store
..........\findrho.m
..........\findrhoquick.m
..........\get_bins.m
..........\pps.c
..........\pps.m
..........\shuffle.m
..........\shufflecycle.m
..........\surrogate.m
..........\surrogates.m