Thread Subject: Programmable/Variable electrical load

I am trying to use test data in the form of an excel file
to simulate a load, but i am unable to do so. To simplify
things, imagine that am connecting a battery to a load, but
i want this load to be my actual real life load (Power)
measured in the lab. I have found help files explaining how
to import excel files and use them, but i cant find a way
to use a port in simscape/simulink to implement a variable
electrical load. Please help and thanks very much