Creating a Load Profile and manipulate the Curves without changing the overall Integration Area

Hello all!

I have Data concerning the required Power Input of Energy (electrical and thermal) for households. Now I am aiming at creating a Load Profile with the Data (by importing the Data from an Excel Table). More importantly I am trying to figure out a way to manipulate/change the Curves of the function without changing the overall Integration Area under the Curves.

Thank you in advance and greetings!