Why is only one tick mark displayed when using datetick?

I have a simple timeseries plot for which I am using datetick to label the x-axis in the format DD/mm as my times are in datenum format. However, after applying datetick, only the first tick mark shows up. I cannot get the later dates to appear. Any ideas? Code below, data attached.

data = load('data.mat');
times = data.times;
rh = data.rh;
plot(times,rh)
datetick('x','DD/mm','keeplimits')

Answer 1

[Chad Greene]

That's because datetick is a bit clunky, and it can't get a lock on a date that it thinks is worthy of displaying. Probably because your date range is somewhat short. For example, here's a year of data:

t = datenum(2005,1,1:365); 
y = sind(t); 

plot(t,y,'bo-') 
datetick('x','DD/mm','keeplimits')

But if you only have 5 days of data it can't find a good match:

t = datenum(2005,1,1:5); 
y = sind(t); 
plot(t,y,'bo-') 
datetick('x','DD/mm','keeplimits')

But you can specify xticks manually. Let's set an x tick every other day:

set(gca,'xtick',t(1:2:end))
datetick('x','DD/mm','keepticks','keeplimits')

[Bruno Rodriguez]

Ah, makes sense. Manually it is then. Thanks!