例子:设x=1:0.01:100;- Y v. ~6 j7 b" j [( g
y1=0.2*sin(x);
2 D+ a+ }/ x: x5 a+ Z y2=0.3*sin(x);
/ U/ W2 ^! t2 Q5 ]: V) V y3=0.4*sin(x);
. K# y8 L% u m- c& P y4=0.5*sin(x);! B$ i7 b( f$ i$ Q2 V, }# d
y5=0.6*sin(x);
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# Y I/ }* q- p8 v R 以左边坐标轴为参考画一条曲线,以右边坐标轴画四条曲线:5 G, w" f3 m/ ]5 E( M! s9 O
figure;
9 _# R; \9 R! S$ p [AX,h1,h2]=plotyy(x,y1,x,[y2;y3;y4;y5]); %用分号还是逗号视y矩阵而定,保持[y2;y3]长度和x一致5 U1 l( |# ?) A- E
set(AX(1),'ycolor','k') %设置左边坐标轴为黑色
/ \+ a% T+ r3 y set(AX(2),'ycolor','r') %设置右边坐标轴为红色+ m7 V9 k& J' V
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set(h1,'linestyle','-','color','k') %设置曲线y1为黑色
# f( {' E& |9 X1 V- e+ A set(h2(1),'linestyle','-','color','r') %设置曲线y2为红色: i0 P" ~9 S* O! N
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set(h2(2),'linestyle','-','color','g') %设置曲线y3为红色
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8 x# M; `- k# w. A }2 H ......7 @3 D4 }$ d& I/ }- F
以左边坐标轴为参考画两条曲线,以右边坐标轴画三条曲线:2 C. {4 n, u+ y. {$ M$ q" ?
figure;
9 A$ R4 x6 g1 m$ } plot(x,y1,'k-')
" I3 y# F" t( E [AX,h1,h2]=plotyy(x,y2,x,[y3;y4;y5]);* d& y" V% Q+ Y" v
......相关设置同上。. m$ G: Z3 \' H5 F$ d+ s
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