fg_02_04.m

来自「英文书《Digital Signal Processing with Examp」· M 代码 · 共 22 行

% fg_02_04        Chapter 2, fig. 2.4
u=[1 2];
v=[2 -1];
%
figure(1); clf;
set(gcf,'position',[370,50,400,400]);
set(gcf,'paperPositionmode','auto');
axis([0 500 -5 5]);
set(gca,'fontname','times','fontsize',18);
set(gca,'position',[.1,.1,.8,.8],'visible','off');
set(gca,'xlim',[-3,3],'ylim',[-3,3]);
%
line([0,0],[-2.5,2.5],'color','k');
line([-2.5,2.5],[0,0],'color','k');
hold on;
hc=compass(u,v);
set(hc,'color','k')
hold off;
ht1=text(1.1,2,'\itA\rm=[1,2]');
ht2=text(2.1,-1,'\itB\rm=[2,-1]');
set([ht1,ht2],'fontsize',18,'fontname','times')