www.gusucode.com > signal 工具箱matlab源码程序 > signal/+fdesign/@abstracttype/passbandzoom.m
function [xlim, ylim] = passbandzoom(this, hfm, varargin) %PASSBANDZOOM Returns the limits of the passband zoom. % Copyright 2005 The MathWorks, Inc. % The method name is required, but everything else is optional. narginchk(2,6); % If the method was passed in as a name, construct the appropriate object. if ischar(hfm) hfm = feval(getdesignobj(this.CurrentSpecs, hfm)); end % If we are passed a DFilt, use it. Otherwise pass [] to the subclasses. if nargin > 2 && isa(varargin{1}, 'dfilt.basefilter') Hd = varargin{1}; varargin(1) = []; else Hd = []; end % Call MASKUTILS to set up the nested function with the inputs which are % the same as the DRAWMASK method. fcns = maskutils(this, isconstrained(hfm), varargin{:}); % Call the subclasses THISPASSBANDZOOM to format the specs/measurements. [xlim, ylim] = thispassbandzoom(this, fcns, Hd, hfm); % The "ylimit" padding can be abstracted up but the "xlimit" cannot. dr_ylim = diff(ylim); % Add some buffer to the ylimits. ylim = [ylim(1)-dr_ylim/10 ylim(2)+dr_ylim/10]; % [EOF]