매트랩에서는 imfilter만 써 봤었는데.. 막상 low pass filter를 어떻게 써야 될지 몰라서 막막해 하다가 구글에서 찾았음. % Examples of Butterworth filter design using Matlab function "butter" % [b,a]=butter(n,0.4) % nth order low pass filter with normalized % cut-off frequency 0.4 [b,a]=butter(n,0.4,'high') % nth order high pass filter [b,a]=butter(n,[0.2 0.5]) % 2*nth order bandpass filter with edge % frequencies 0.2 and 0.5 [b,a]=butte..