File list (Check if you may need any files):
lowpass\matlab\FIR\ditong21.jpg
.......\......\...\ditong22.jpg
.......\......\...\FIR.txt
.......\......\...\lowpass.m
.......\......\IIR\ditong31.jpg
.......\......\...\ditong32.jpg
.......\......\...\ditong33.jpg
.......\......\...\IIR.txt
.......\......\...\lowpass.m
.......\simulink\data.txt
.......\........\ditong.jpg
.......\........\ditong1.jpg
.......\........\ditong2.jpg
.......\........\ditong2_.jpg
.......\........\ditong3.jpg
.......\........\ditong3_.jpg
.......\........\lowpass.mdl
.......\matlab\FIR
.......\......\IIR
.......\matlab
.......\simulink
lowpass