gusucode.com > 《精通matlab 7》包括配套光盘 > 配套光盘里的程序附件/Ex-30/testclass/@polynom/plot.m
function plot(p) % POLYNOM/PLOT PLOT(p) plots the polynom p. r = max(abs(roots(p))); x = (-1.1:0.01:1.1)*r; y = polyval(p,x); plot(x,y); title(char(p)) grid on