www.gusucode.com > 利用MATLAB GUI设计滤波器界面,可以设计IIR滤波器 > AFD/FilterOrder_HelpContext.m
function FilterOrder_HelpContext % FilterOrder_HelpContext is a subfile of the AnalogFilter GUI collection % % James C. Squire, 2002 % Assistant Professor, Virginia Military Institute % ver 1.0 % FilterOrder_HelpContext provides simple help information % create help text text{1} = 'Overview: Determine what filter order is required to meet a given set of specifications.'; text{2} = ' '; text{3} = 'Filter Cutoff Frequency'; text{4} = 'As defined in the Specify Filter dialog; usually the 3dB knee'; text{5} = ' '; text{6} = 'F1'; text{7} = 'Any other frequency, usually given as a frequency in the stopband.'; text{8} = ' '; text{9} = 'Filter gain at F1'; text{10} = 'This gain is usually a negative number in dB, specifying a desired attenuation at a frequency in the stopband'; text{14} = ' '; text{15} = 'See the printed documentation for more details.'; % create help popup window msgbox(text,'Help: Filter Order','none')