matlab绘图，到底问题在哪啊？

Question

t=readtable('399300.csv');
t1=table2array(t(3610:end,4));
t2=table2array(t(3610:end,10));
t0=table2array(t(3610:end,1));
t21=find(t2>=0);
t22=find(t2<0);
figure
yyaxis left
plot(t0,t1,'-b','LineWidth','1.5')
ylim([2500,6000])
hold on
m=find(t1==max(t1));
plot(t0(m),t1(m),'ro')
text(t0(m+1),t1(m),'\fontsize{14}\fontname{楷书}t1(m),t0(m)')
hold off
ylable('收盘价')
yyaxis right
plot(t0(t21),t2(t21),'r.',t0(t22),t2(t22),'g.','MarkerSize',12)
ylim([-8,6])
grid on
ylable('涨跌幅')
xlable('t')