| [ KAIST ] in KIDS 글 쓴 이(By): Gatsbi (궁금이) 날 짜 (Date): 2001년 2월 13일 화요일 오전 10시 33분 48초 제 목(Title): Re: [질문] 매티랩에서 필터를 디자인하고 � FIR filter는 IIR filter에 포함됩니다. 간단히 말해서 전자는 분자만 있는 필터, 후자는 분자 분모 전부 있는 필터. 따라서 FIR filter를 설계할 때에도 filter란 함수를 사용할 수 있습니다. Y/X = B/A Y : 출력, X : 입력 신호 B : 분자 계수의 벡터, A : 분모 계수의 벡터 나머지는 책 찾아보세요. ******** � help filter FILTER One-dimensional digital filter. Y = FILTER(B,A,X) filters the data in vector X with the filter described by vectors A and B to create the filtered data Y. The filter is a "Direct Form II Transposed" implementation of the standard difference equation: a(1)*y(n) = b(1)*x(n) + b(2)*x(n-1) + ... + b(nb+1)*x(n-nb) - a(2)*y(n-1) - ... - a(na+1)*y(n-na) If a(1) is not equal to 1, FILTER normalizes the filter coefficients by a(1). When X is a matrix, FILTER operates on the columns of X. When X is an N-D array, FILTER operates along the first non-singleton dimension. [Y,Zf] = FILTER(B,A,X,Zi) gives access to initial and final conditions, Zi and Zf, of the delays. Zi is a vector of length MAX(LENGTH(A),LENGTH(B))-1 or an array of such vectors, one for each column of X. FILTER(B,A,X,[],DIM) or FILTER(B,A,X,Zi,DIM) operates along the dimension DIM. See also FILTER2, FILTFILT (in the Signal Processing Toolbox). Overloaded methods help demtseries/filter.m ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^#####^^^^^^^^^^^^^^^^^^^ ^ 진리는 단순하고 진실은 소박하다. |.-o| ^ ^ ㄴ[ L ]ㄱ 궁금이 ^ ^ (~) ^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |