Module fri.utils

View Source

import numpy as np

def distance(u, v):

    """

    Distance measure custom made for feature comparison.

    Parameters

    ----------

    u: first feature

    v: second feature

    Returns

    -------

    """

    u = np.asarray(u)

    v = np.asarray(v)

    # Euclidean differences

    diff = (u - v) ** 2

    # Nullify pairwise contribution

    diff[u == 0] = 0

    diff[v == 0] = 0

    return np.sqrt(np.sum(diff))

def permutate_feature_in_data(data, feature_i, random_state):

    X, y = data

    X_copy = np.copy(X)

    # Permute selected feature

    permutated_feature = random_state.permutation(X_copy[:, feature_i])

    # Add permutation back to dataset

    X_copy[:, feature_i] = permutated_feature

    return X_copy, y

Functions

distance

def distance(
    u,
    v
)

Distance measure custom made for feature comparison.

Parameters

u: first feature v: second feature

Returns

View Source

def distance(u, v):

    """

    Distance measure custom made for feature comparison.

    Parameters

    ----------

    u: first feature

    v: second feature

    Returns

    -------

    """

    u = np.asarray(u)

    v = np.asarray(v)

    # Euclidean differences

    diff = (u - v) ** 2

    # Nullify pairwise contribution

    diff[u == 0] = 0

    diff[v == 0] = 0

    return np.sqrt(np.sum(diff))

permutate_feature_in_data

def permutate_feature_in_data(
    data,
    feature_i,
    random_state
)

View Source

def permutate_feature_in_data(data, feature_i, random_state):

    X, y = data

    X_copy = np.copy(X)

    # Permute selected feature

    permutated_feature = random_state.permutation(X_copy[:, feature_i])

    # Add permutation back to dataset

    X_copy[:, feature_i] = permutated_feature

    return X_copy, y