[問題]下列的圖畫不出來

[angu81681652 (fantasy)]

會出現下列錯誤訊息：
Attempt to reference field of non-structure array.


clc;
clear;
x1=[0.01,0.1,1,2,3,4,5,6];
y1=[1.1,1.05,2.2,7.1,20.2,60.3,145.6,402.8];
x2=[0.01:0.02:6];
y2=exp(x2);
subplot(1,2,1)
plot(x1.y1,'*b',x2,y2,'-k')
subplot(1,2,2)
semilog(x1.y1,'*b',x2,y2,'-k')

請問要怎麼改，謝謝

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→ DKer:x1.y1    這啥?
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