www.gusucode.com > control 案例程序 matlab源码代码 > control/NicholsResponseWithNicholsGridLinesExample.m
%% Nichols Response with Nichols Grid Lines % Plot the Nichols response with Nichols grid lines for the following % system: %% % % $$H(s) = \frac{{ - 4{s^4} + 48{s^3} - 18{s^2} + 250s + 600}}{{{s^4} + % 30{s^3} + 282{s^2} + 525s + 60}}.$$ % %% % Copyright 2015 The MathWorks, Inc. H = tf([-4 48 -18 250 600],[1 30 282 525 60]); nichols(H) ngrid %% % The right-click menu for Nichols charts includes the *Tight* option under *Zoom*. % You can use this to clip unbounded branches of the Nichols chart.