（1）画竖直的errorbar

例子：

close all;figure;

   h=bar(volume_month_mean./1e6);       %--volume_month_mean 为12×2的矩阵

   set(h,'BarWidth',0.9);

   hold on;

   set(h(1),'facecolor',[139 35 35]./255)    %--设置bar的颜色

   set(h(2),'facecolor','k')

   ngroups = size(volume_month_mean,1);

   nbars = size(volume_month_mean,2);

   groupwidth =min(0.8, nbars/(nbars+1.5));

   hold on;

   for i = 1:nbars              %--画errorbar

       x = (1:ngroups) - groupwidth/2 + (2*i-1) * groupwidth / (2*nbars);

       errorbar(x,volume_month_mean(:,i)/1e6,volume_month_std(:,i)/1e6,'o','color',[.5 .5 .5],'linewidth',2);

   end

   for n=1:12

       if n<=9

           time_lab{n,1}=['0' num2str(n)];

       else

           time_lab{n,1}=num2str(n);

       end

   end

set(gca,'XTickLabel',time_lab,'fontsize',14,'linewidth',2)

   ylim([-0.5 2.5])

   xlim([0 13])

   set(gca,'ytick',-0.5:0.5:2.5)

（2）画水平errorbar

例子：

close all;figure;

   h=bar(volume_mean./1e6);           %--volume_mean是4*2的矩阵

   set(h,'BarWidth',0.9);

   hold on;

   set(h(1),'facecolor',[139 35 35]./255)

   set(h(2),'facecolor','k')

   ngroups = size(volume_mean,1);

   nbars = size(volume_mean,2);

   groupwidth =min(0.8, nbars/(nbars+1.5));

   hold on;

   for i = 1:nbars

       x = (1:ngroups) - groupwidth/2 + (2*i-1) * groupwidth / (2*nbars);

       errorbar(x,volume_mean(:,i)/1e6,volume_std(:,i)/1e6,'o','color',[.5 .5 .5],'linewidth',2);

   end

   view(-90,90)

   set(gca,'xdir','reverse','ydir','reverse','XTickLabel',{'Winter','Spring','Summer','Autumn'},'fontsize',14,'linewidth',2)

   ylim([-0.5 2.5])

   set(gca,'ytick',-0.5:0.5:2.5)

   ye_xylabel(gca,' ','Volume[Sv]')

   legend('A','B','location','NorthEast')