Pulling trials out of a set of time

Hello,

I have data that was pre-processed and taken over a period of 24 minutes.Unfortunately the data I have the processed data's time vector is not in normal intervals. Within this 24 minute time frame occurred 36 trials with a specific layout.

I would like to separate this data by the trials, and by aspects within the trials. intro = 0-4 seconds task = 4-14.5 seconds response = 14.5 - 29.5 seconds transition = 29.5 seconds (repeat for all 36 trials)

any ideas on how i could go about completeing this?

I would think I would need a for loop and if loop and a variable that changes over time.

something like this?

introHold = 0;
taskHold = 4;
respHold = 14.5;
transHold = 29.5;
taskNum = 1;

for i = numel(data)
if data taskHold > data(i) > introHold
task(taskNum).intro = data(i)
else

Any ideas would be very helpful!

Thank you,

ML