def setup(self, table):
"""
normalize the data ranges before calling parent setup with normalized table
"""
self.data = table.to_numpyMA('ac')[0]
pred_columns = [table.domain.index(table.domain[c]) for c in self.cols]
search_cols = [pos for pos in pred_columns
if table.domain[pos].varType != orange.VarTypes.Discrete]
bounds = Zero.compute_bounds(self.data[:, search_cols])
self.zero = Zero(search_cols, bounds=bounds)
self.zerod_data = self.zero.zero(self.data)
self.zerod_table = Orange.data.Table(table.domain, self.zerod_data.data)
super(ZeroBottomUp, self).setup(self.zerod_table)
