NOTICE

The upcoming release of Featuretools 1.0.0 contains several breaking changes. Users are encouraged to test this version prior to release by installing from GitHub:

pip install https://github.com/alteryx/featuretools/archive/woodwork-integration.zip

For details on migrating to the new version, refer to Transitioning to Featuretools Version 1.0. Please report any issues in the Featuretools GitHub repo or by messaging in Alteryx Open Source Slack.

Source code for featuretools.primitives.standard.cum_transform_feature

import numpy as np

from featuretools.primitives.base import TransformPrimitive
from featuretools.variable_types import Discrete, Id, Numeric


class CumSum(TransformPrimitive):
    """Calculates the cumulative sum.

    Description:
        Given a list of values, return the cumulative sum
        (or running total). There is no set window, so the
        sum at each point is calculated over all prior values.
        `NaN` values will return `NaN`, but in the window of a
        cumulative caluclation, they're ignored.

    Examples:
        >>> cum_sum = CumSum()
        >>> cum_sum([1, 2, 3, 4, None, 5]).tolist()
        [1.0, 3.0, 6.0, 10.0, nan, 15.0]
    """
    name = "cum_sum"
    input_types = [Numeric]
    return_type = Numeric
    uses_full_entity = True
    description_template = "the cumulative sum of {}"

    def get_function(self):
        def cum_sum(values):
            return values.cumsum()

        return cum_sum


class CumCount(TransformPrimitive):
    """Calculates the cumulative count.

    Description:
        Given a list of values, return the cumulative count
        (or running count). There is no set window, so the
        count at each point is calculated over all prior
        values. `NaN` values are counted.

    Examples:
        >>> cum_count = CumCount()
        >>> cum_count([1, 2, 3, 4, None, 5]).tolist()
        [1, 2, 3, 4, 5, 6]
    """
    name = "cum_count"
    input_types = [[Id], [Discrete]]
    return_type = Numeric
    uses_full_entity = True
    description_template = "the cumulative count of {}"

    def get_function(self):
        def cum_count(values):
            return np.arange(1, len(values) + 1)

        return cum_count


class CumMean(TransformPrimitive):
    """Calculates the cumulative mean.

    Description:
        Given a list of values, return the cumulative mean
        (or running mean). There is no set window, so the
        mean at each point is calculated over all prior values.
        `NaN` values will return `NaN`, but in the window of a
        cumulative caluclation, they're treated as 0.

    Examples:
        >>> cum_mean = CumMean()
        >>> cum_mean([1, 2, 3, 4, None, 5]).tolist()
        [1.0, 1.5, 2.0, 2.5, nan, 2.5]
    """
    name = "cum_mean"
    input_types = [Numeric]
    return_type = Numeric
    uses_full_entity = True
    description_template = "the cumulative mean of {}"

    def get_function(self):
        def cum_mean(values):
            return values.cumsum() / np.arange(1, len(values) + 1)

        return cum_mean


class CumMin(TransformPrimitive):
    """Calculates the cumulative minimum.

    Description:
        Given a list of values, return the cumulative min
        (or running min). There is no set window, so the min
        at each point is calculated over all prior values.
        `NaN` values will return `NaN`, but in the window of a
        cumulative caluclation, they're ignored.

    Examples:
        >>> cum_min = CumMin()
        >>> cum_min([1, 2, -3, 4, None, 5]).tolist()
        [1.0, 1.0, -3.0, -3.0, nan, -3.0]
    """
    name = "cum_min"
    input_types = [Numeric]
    return_type = Numeric
    uses_full_entity = True
    description_template = "the cumulative minimum of {}"

    def get_function(self):
        def cum_min(values):
            return values.cummin()

        return cum_min


class CumMax(TransformPrimitive):
    """Calculates the cumulative maximum.

    Description:
        Given a list of values, return the cumulative max
        (or running max). There is no set window, so the max
        at each point is calculated over all prior values.
        `NaN` values will return `NaN`, but in the window of a
        cumulative caluclation, they're ignored.

    Examples:
        >>> cum_max = CumMax()
        >>> cum_max([1, 2, 3, 4, None, 5]).tolist()
        [1.0, 2.0, 3.0, 4.0, nan, 5.0]
    """
    name = "cum_max"
    input_types = [Numeric]
    return_type = Numeric
    uses_full_entity = True
    description_template = "the cumulative maximum of {}"

    def get_function(self):
        def cum_max(values):
            return values.cummax()

        return cum_max