09-10.txt

MATLABR2006a基础教程

>> t=0:pi/20:2*pi;
>> x=sin(t);
>> plot(t,x);
>> title('Value of the sine from 0 to 2\pi');
>> xlabel('t = 0 - 2\pi');
>> ylabel('sin(t)');
>> text(pi/4,sin(pi/4),'\rightarrow sin(t)=0.707');
>> text(pi,sin(pi),'\rightarrow sin(t)=0');
>> text(5*pi/4,sin(5*pi/4),'\rightarrow sin(t)= - 0.707');
>> text_handle = findobj('String','\rightarrow sin(t)=0.707');
>> set(text_handle,'Position',[3*pi/4,sin(3*pi/4),0])