Time format/Repeating Times in a table

I have a table with time values written like this: 0830 for 08:30 AM. How can I change the format, so that Matlab recognizes that this is a time and not a number?

Next, I'd like to plot values for each of these times in a graph. The values change, but the times repeat because there are only 24 hours in a day obviously. How can I plot the values after each other and not on top of each other for the different days?

Thank you so much for help on either problem.

Answer 1

[Cris LaPierre]

Covert your times to strings (keeping the leading zeros), and then use datetime to convert..

T = 0830;
T = sprintf('%04d',T)

T = '0830'

dur = datetime(T,'InputFormat','HHmm','Format','h:mm a')

dur = datetime
   8:30 AM