问题描述：
【matlab】求教帮忙看看这段代码怎么错了,
x=0;0.1:2*pi;
>> y1=sin(x);
>> y2=sin(2*x);
>> y3=sin(4*x);
>> plot(x,y1,'ob',x,y2,'--dc',x,y3,'vr');
>> axis([0 8 -1.25 1.25]);
>> xlabel('x');
>> ylabel('y');
>> title('sin(x)/sin(2x)/sin(4x)');
>> legend('y=sin(x)','y=sin(2*x)','y=sin(4*x)')
Warning:Plot empty.
> In legend at 286
报错都出来了,小白一枚,望多多指教!
x=0;0.1:2*pi;
>> y1=sin(x);
>> y2=sin(2*x);
>> y3=sin(4*x);
>> plot(x,y1,'ob',x,y2,'--dc',x,y3,'vr');
>> axis([0 8 -1.25 1.25]);
>> xlabel('x');
>> ylabel('y');
>> title('sin(x)/sin(2x)/sin(4x)');
>> legend('y=sin(x)','y=sin(2*x)','y=sin(4*x)')
Warning:Plot empty.
> In legend at 286
报错都出来了,小白一枚,望多多指教!
问题解答：
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