www.gusucode.com > IPCV_Eval_Kit_R2019a_0ce6858工具箱matlab程序源码 > IPCV_Eval_Kit_R2019a_0ce6858/code/demo_files/I1_02_grademo/fill2d.m
f1=figure(1); clf reset set(f1,'units','normalized','position',[0.3652 0.3008 0.6016 0.6016]) x=-5:0.05:5; p=[1 0 -20 10]; y=polyval(p,x); r=sort(roots(p)); x1=r(1):0.1:r(2); y1=polyval(p,x1); plot(x,y) hold on fill(x1,y1,'r') grid