File list (Check if you may need any files):
谱分析
......\信号的频谱
......\..........\hundie.m
......\..........\lxcaiyang.m
......\..........\rectcaiyang.m
......\..........\sinccy.m
......\..........\xulie.m
......\..........\xulie1.m
......\..........\xxtpcaiyang.m
......\..........\zero_in3.m
......\..........\zero_inxl.m
......\..........\zqxulie1.m
......\..........\zxxulie.m
......\误差改进方法
......\............\buling.m
......\............\jiac.m
......\............\zjgzsj.m
......\频率解与动态区域解
......\..................\dongtaijie.m
......\..................\freresult.m