change the xticklabel with date format

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Rt Ro
Rt Ro 2019-5-8
评论： Rt Ro 2019-5-9
I want to show all dates in the x-axis of the below fig. (jan 71, jan 72, ...)
and please tell me how I can remove the labels of second y axis after 20 (the black circles) ?
could you please help me.
Eforc=load('forc.txt');
P=Eforc(:,5);
Q=Eforc(:,4);
date = datenum(Eforc(366:end ,1:3));
[ax,h1,h2] = plotyy(date,Q(366:end),date,P(366:end),'plot', 'bar');
set(ax(2), 'Ydir', 'reverse','YTick',[0,10,20]);
ylim(ax(1), [0 3]);
set(h2,'EdgeColor','[0 0.45 0.74]','faceColor','[0 0.45 0.74]');
ylim(ax(2), [0 90]);
st=(date(1));
se=(date(end));
% ax(1).XTickLabel = [st se];ax(2).XTickLabel = [st se];
% set(gca,'xtick');
set(ax(1),'xlim',[st se],'FontSize',12,'FontName', 'Times New Roman');
set(ax(2),'xlim',[st se],'FontSize',12,'FontName', 'Times New Roman');
% legend('show');
datetick('x','mmmyy','keeplimits');

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采纳的回答

Rik
Rik 2019-5-8
I don't know if there is a control for the non-marked ticks, but maybe box does something you like.
For the ticks, you should be able to use datetick to get there ( 'mm yy' as format should work).
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Walter Roberson
Walter Roberson 2019-5-9
With that data and your release then using datetime instead of datenum would be cleaner.
Rt Ro
Rt Ro 2019-5-9
thank you so much. I changed datetime and keepticks instead of keeplimits, then the problem was solved.

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