【重学Matlab】Note6二维绘图特殊坐标系

极坐标

• theta:相角
• rho: 极径
• Linespace&＃xff1a;与plot类似。记不得就翻之前的文章

>>>th &＃61; 0:.01*pi:4*pi;
r &＃61; abs(sin(th).*cos(th));
polarplot(th, r, &＃39;rh&＃39;, &＃39;linewidth&＃39;, 2, &＃39;markerindices&＃39;, 1:1:length(r))


半对数坐标

>>> t &＃61; logspace(1,4, 100);
semilogx(t, sin(t).*exp(-t), &＃39;r-&＃39;)


>> t &＃61; 1:20;
semilogy(t, t.^3&＃43;4*t.^2)


双对数坐标

>> t &＃61; logspace(1, 3, 200);
>loglog(t, abs(sin(t).*log(t)))


双Y轴坐标

>> t &＃61; -5:.1:5;
yyaxis left
plot(t, sin(t))
yyaxis right
plot(t, 4*cos(t))


>> t &＃61; -5:.1:5;
ac &＃61; subplot(2,2,2);
yyaxis(ac,&＃39;right&＃39;)
plot(ac, t, 2*sin(t))


>> yyaxis(ac, &＃39;left&＃39;)
plot(ac, t, 3*cos(2*t))