www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@latticearma/thisisreal.m
function f = thisisreal(Hd) %THISISREAL True for filter with real coefficients. % THISISREAL(Hd) returns 1 if filter Hd has real coefficients, and 0 % otherwise. % % See also DFILT. % Author: Thomas A. Bryan % Copyright 1988-2002 The MathWorks, Inc. % This should be private f = isreal(Hd.Lattice) & isreal(Hd.Ladder);