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# Modify axis tick frequency

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Christoph Meier on 12 Aug 2015
Commented: Ehsan Modiri on 27 Jun 2020
Dear Matlab community,
I have successfully produced the following plot:
by using the following code:
dn=datenum(1926,7+[0:(2014-1926)*12+5].',1);
datestr([dn(1),dn(end)]);
plot(dn,y);
xlim([dn(1) dn(end)]);
datetick('x','mm/yyyy','keeplimits');
I now would like to adjust the frequency of the x-axis date ticks, but I cannot make sense of the function. I believe datetick is set on auto mode, where it produces a default number of ticks. I am looking for 1-year and 5-year intervals.
Thank you very much! The help from the MATLAB community has helped me a great deal!
Chris
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### Accepted Answer

Walter Roberson on 12 Aug 2015
If you want 1 year and 5 year ticks both at the same time then you would be wanting the 1 year ticks to be Minor Ticks and the 5 year ticks to be the major ticks. See http://www.mathworks.com/matlabcentral/answers/97759-how-do-i-add-minor-ticks-to-a-graph for information about setting minor ticks.
For the 5 year ticks:
tick5 = datenum(1930:5:2014,1,1);
set(gca, 'xtick', tick5);
datetick('x', 'yyyy', 'keepticks');
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Ehsan Modiri on 27 Jun 2020
tick5 = datetime(1930:2014,1,1);
set(gca, 'Xtick', tick5)
instead of datenum, you can use datetime.

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