How to send seperate sets of histogram

Hi,

Suppose I have these sets of data
[1,2,3,4]
[5,6,7,8]

When I use the histogram, it aggregates all the 8 values and sends the histogram. So this continues to grow. What I actually need is to have separate sets of histograms i.e. only [1,2,3,4] and next set should only contain [5,6,7,8].

How to do this?

Thanks!
