featuretools.primitives.TimeSinceLastMin#

class featuretools.primitives.TimeSinceLastMin[source]#

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