How to get the index from a datetime array corresponding to a time duration?

Hi I am trying to get the starting and ending index from a datetime array that corresponds to a specific time duration.

Find below my code for a general datetime array

t1 = datetime('23-Feb-2015 09:43:08')
num=2000
t2 = t1 + seconds(1:num)

I am interested in getting the starting and ending index from t2 with a time step durations of 5min.

index1=starting and ending index from t2 which corresponding to first 5 min.
index2=starting and ending index from t2 which corresponding to next 5 min .
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index= starting and ending index from t2 which corresponds to remaining time.

I tried something using "minutes" but i do not know how to access the starting and ending index from t2. Can you please help?

[Walter Roberson]

Duplicates http://uk.mathworks.com/matlabcentral/answers/226911-how-to-get-the-index-from-a-datetime-array-corresponding-to-a-time-duration

[yashvin]

Thanks. My browser was reloading. Do you have any idea regarding it?