How do I convert a decimal number to a time?

How would I convert a number such as 7.8 into a time in HH:MM? 7.8 is 7.8 hours from the start of the day, so should be shown as 07:48.

[jonas]

Well, that depends on the unit of 7.6342

[Liam Quantrill]

Hi jonas, sorry yeah I forgot to mention that, I was updating my question as you replied hahah

Answer 1

[jonas]

Alternatively, if you just want to display amount of hours and minutes.

duration(hours(7.8),'format','hh:mm')

ans =

duration

   07:48

[Liam Quantrill]

Thank you, this is just what I was looking for :)

[Sean de Wolski]

Now you can work with the duration to add it to another time, build a vector, or convert it to another unit of time!

[Peter Perkins]

Equivalently:

>> t = hours(7.8)
t = 
  duration
   7.8 hr
>> t.Format = 'hh:mm'
t = 
  duration
   07:48

[ameena sorour]

If I want the opisite from 07:48 to 7.8?

[Walter Roberson]

hours(t)

Answer 2

[KALYAN ACHARJYA]

datestr(hours(7.8),'HH:MM');

Result

>> datestr(hours(7.8),'HH:MM')

ans =

07:48

[Liam Quantrill]

Hi Kalyan, sorry, I was updating my question as you replied, 7.8 hours should be 7.8 hours from the beginning of the day, so should show as 07:48. Using your solution I get the time as 19:12.

[KALYAN ACHARJYA]

Updated answer datestr(hours(7.8),'HH:MM');

[Sean de Wolski]

This is the old way to to it (before R2014b). In more recent releases, the duration approach is better.

[KALYAN ACHARJYA]

Thanks for the information.