This example checks whether the function derivative
is implemented correctly. If the derivative implementation
is not correct, the model will stop with an assert statement.
- 
October 13, 2021, by Michael Wetter:
Added new output for higher order derivatives.
This is for
IBPSA, issue 1531.
 
- 
August 17, 2015 by Michael Wetter:
Updated regression test to have slope that is different from one.
This is for
issue 303.
 
- 
May 20, 2008, by Michael Wetter:
First implementation.
 
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