def build_sample_smoother_problem_friedman82(N=<NUM_LIT:200>):
x = numpy.random.uniform(size=N)<EOL>err = numpy.random.standard_normal(N)<EOL>y = numpy.sin(<NUM_LIT:2> * math.pi * (<NUM_LIT:1> - x) ** <NUM_LIT:2>) + x * err<EOL>return x, y<EOL>
Sample problem from supersmoother publication.