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Converting regular numbers into "time"

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Sarah on 12 Apr 2012
Hi everyone,
I have a question. If I define a vector like so:
TStart = 0; TEnd = 1000; TStep = 1; Time = TStart:TStep:TEnd;
Is there any way where I can convert this to date format, so that when I plot:
The x axis will have time stamps corresponding to the way I defined my Time array, and not just numbers?
I looked into datetick, but I'm not sure if I am on the right track here...

Answers (1)

Walter Roberson
Walter Roberson on 12 Apr 2012
For datetick to work, the Time vector should be in the unit of full days. If, for example, your TStep was intended to reflect hours, then divide Time by 24
Oleg Komarov
Oleg Komarov on 14 Apr 2012
@Sarah: your result is inconsistent with the example.
If you run the example you provided, together with Walter's code, you should be getting 5 ticks: 00:00, 00:05, 00:10, 00:15 and 00:20.
Peter Wittenberg
Peter Wittenberg on 14 Apr 2012
The 00:00 is correct for the time you put in. What's happening is that you are putting in a time stream so long that MATLAB is choosing tick mark dates that are integers, with each integer being a full day, starting at 00:00 when you put it in the HH:MM format. Adjust the time variable so that it covers a total time interval of less than one day and you'll see other numbers. For example, time =0:.001:1 will give you 1000 points spaced at 1/1000 of a day (1.44 minute) intervals

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