def to_ic50(x, max_ic50=<NUM_LIT>):
return max_ic50 ** (<NUM_LIT:1.0> - x)<EOL>
Convert regression targets in the range [0.0, 1.0] to ic50s in the range
[0, 50000.0].

Parameters
----------
x : numpy.array of float

Returns
-------
numpy.array of float