Clip

class nvtabular.ops.Clip(min_value=None, max_value=None)[source]

Bases: nvtabular.ops.operator.Operator

This operation clips continuous values so that they are within a min/max bound. For instance by setting the min value to 0, you can replace all negative values with 0. This is helpful in cases where you want to log normalize values:

# clip all continuous columns to be positive only, and then take the log of the clipped
# columns
columns = ColumnSelector(CONT_NAMES) >> Clip(min_value=0) >> LogOp()
Parameters

  • min_value (float, default None) – The minimum value to clip values to: values less than this will be replaced with this value. Specifying None means don’t apply a minimum threshold.

  • max_value (float, default None) – The maximum value to clip values to: values greater than this will be replaced with this value. Specifying None means don’t apply a maximum threshold.

transform(col_selector: merlin.dag.selector.ColumnSelector, df: pandas.core.frame.DataFrame) → pandas.core.frame.DataFrame[source]

Transform the dataframe by applying this operator to the set of input columns

Parameters

  • columns (list of str or list of list of str) – The columns to apply this operator to

  • df (Dataframe) – A pandas or cudf dataframe that this operator will work on

Returns

Returns a transformed dataframe for this operator

Return type

DataFrame