How to change time intervals to time elapsed

I have time data in a column vector which was measured in intervals of time meaning I can't plot this against distance to get a velocity graph.

How do I create a new column vector with the total time elapsed up to each point? (e.g. 1,2,1,1,3 to 1,3,4,5,8)

Thanks

Answer 1

[SHIVAM KUMAR]

You can do this simply using a loop

a=[1 2 1 1 3]
sum=0;
result=zeros(1,length(a));
for i=1:length(a)
    sum=sum+a(i);
    result(i)=sum;
end

It this is fine accept the answer.

[William]

There is a function named cumsum() for doing this:

result = cumsum(a);

[Rewsen Yildirim-Nevay]

Thanks

[Steven Lord]

The cumsum function also works with a duration array, if you want to make it clear that your time data does represent time.

m = minutes(randi([0 9], 1, 7)) + seconds(randi([0 59], 1, 7));
m.Format = 'mm:ss'

m = 1×7 duration array
   00:28   01:32   09:51   03:38   00:03   04:53   03:17

n = cumsum(m)

n = 1×7 duration array
   00:28   02:00   11:51   15:29   15:32   20:25   23:42