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%功能:坐标轴标注函数text使用实例 x=0:pi/100:2*pi; y=sin(x); plot(x,y) axis([0,2*pi -1.5 1.5]) line([0 2*pi],[0,0]) text(0.5,0.85,'sin(x)','sc') text(0.5*pi,0.5,'position') text(1.5*pi,-0.5,'negative')