featuretools.primitives.TimeSinceLastMin

class featuretools.primitives.TimeSinceLastMin

Calculates the time since the minimum value occurred.

Description:

Given a list of numbers, and a corresponding index of datetimes, find the time of the minimum value, and return the time elapsed since it occured. This calculation is done using an instance id’s cutoff time.

If multiple values equal the minimum, use the first occuring minimum.

Examples

>>> from datetime import datetime
>>> time_since_last_min = TimeSinceLastMin()
>>> cutoff_time = datetime(2010, 1, 1, 12, 0, 0)
>>> times = [datetime(2010, 1, 1, 11, 45, 0),
...          datetime(2010, 1, 1, 11, 55, 15),
...          datetime(2010, 1, 1, 11, 57, 30)]
>>> time_since_last_min(times, [1, 3, 2], time=cutoff_time)
900.0

__init__()

Methods

__init__()
flatten_nested_input_types(input_types)	Flattens nested column schema inputs into a single list.
generate_name(base_feature_names, ...)
generate_names(base_feature_names, ...)
get_args_string()
get_arguments()
get_description(input_column_descriptions[, ...])
get_filepath(filename)
get_function()

Attributes

base_of
base_of_exclude
commutative
default_value	Default value this feature returns if no data found.
description_template
input_types	woodwork.ColumnSchema types of inputs
max_stack_depth
name	Name of the primitive
number_output_features	Number of columns in feature matrix associated with this feature
return_type	ColumnSchema type of return
stack_on
stack_on_exclude
stack_on_self
uses_calc_time