using lab test data in simulink to simulate a variable load

Hello,
i am trying to use data obtained from a test cycle.
This data is provided in an excel *** and contains power
usage..ie how much power is required from the battery to
push a load.
To simplify things..i am trying to simulate a load using
real data...so the load is variable..(a programmable load).

My circuit is simple..consists of a battery (LIOH), a load
( my data) and measuring equipment.

The purpose of the experiment is to test the dynamics of
the battery.

Please help and thanks in advance.
.