I have a full pulse wave. How to separate each cycle and store the values in separate vectors?

I have a full pulse wave.

How to separate each cycle and store the values in separate vectors?

The maximum and minimum value for each cycle is varying: for pulse1: max=1102, minimum=780 for pulse2: max=1098, minimum=782.. and so on.

For example, if I have the whole set of data stored in the vector named "pulse" (I imported the data from a .xlsx file and stored in a column vector). I want to separate the data into separate vectors named "pulse1", "pulse2" etc.

The second query is, how to obtain a function to represent this data? For example, could there be a function y=..... which would represent this pulse wave?

Thanks