求助 MATLAB plot一直报错 字符串未知

[Memorize11]

i=2.25e-3; v=1.22; L=0:0.0005:0.01; Lmin=5.97e-4; Lmax=7.54e-3; V=0:0.00001:2.5; V1=5.810*sqrt(0.00628+0.11*L.^(2/3)); %漏液线V2=2.142-12.588*L.^(2/3); %雾沫夹带线V3=sqrt(6.28-11963*L.^2-46.38*L.^(2/3)); %液泛线V4=(v/i)*L; %操作线plot(L,V1,L,V2,V3,Lmin,V,'k+',Lmax,V,'k+',L,V4,i,v,'k+','linewidth',1,'markersize',5) axis([0 0.01 0 2.5]) gridtitle('提馏段的精馏塔负荷') Plot一直报错 unknown option 百度了用了hold on拆分也不行