On the x-axis of my plot should be the time and on the y-axis the value. For each value I have a time stamp in milliseconds. I would like to have on the x-axis a tick every say 5 minutes, say 16:05, 16:10, 16:15 and so on. The time distance between the values is not equal.
How can this be done?
An example of a data vector is (first column timestamp, second column value):
27634517312999, 1.1111809015274048
27658503234656, 0.7998865246772766
27662988099446 0.7806665897369385
27664499628612 0.7781039476394653
27950691973920 0.8562135696411133
27970195902662 0.8036822080612183
27973194252661 0.7908696532249451
....
I think I have to be more clear. Each value has an assigned absolute timestamp in milliseconds which represents the time elapsed from 1970 (I think). I have gathered this values by System.currentTimeMillis() call from Java. For example 27658503234656 corresponds to Mon Jun 18 2846 14:33:54 GMT+0100. The values span rougly a range of one hour (the same year, day etc.). That means the first timestamp is 27658501657000 (representing Mon Jun 18 2846 14:07:37 GMT+0100) and the last timestamp is 27658504995000 (representing Mon Jun 18 2846 15:03:15 GMT+0100). I'm only interested in 14:07 until 15:03. On my x-axis the first label should be at 14:10 and then there should be labels every 5 min, i.e. 14:15, 14:20 etc. The last label is at 15:00.
How can this be done?
The answer by Adriaan using datetick should be the easy solution. If you like to control the level of detail by yourself, you could do something like:
% suppose data is your matrix (n x 2)
t = data(:,1) / 1000 / 3600 / 24; % time from ms to days
plot(t, data(:,2), '+-');
ticks = linspace(min(t), max(t), 5); % 5 ticks from min to max
labels = datestr(ticks, 'HH:MM'); % get only hours and minutes
set(gca, 'xtick', ticks, 'xtickLabel', labels);