Stats

The frouros.utils.stats module contains auxiliary stats classes or exceptions.

Stats module.

class frouros.utils.stats.BaseStat

Abstract class representing an statistic.

abstract get() → float

Get method.

class frouros.utils.stats.IncrementalStat

Abstract class representing an incremental statistic.

abstract update(value: Union[int, float]) → None

Update abstract method.

abstract get() → float

Get method.

class frouros.utils.stats.Mean

Incremental mean class.

property mean: float

Mean property.

Returns:

mean value

Return type:

float

property num_values: int

Number of values property.

Returns:

number of values

Return type:

int

update(value: Union[int, float]) → None

Update the mean value sequentially.

Parameters:

value (int) – value to use to update the mean

Raises:

TypeError – Type error exception

static incremental_op(value: Union[int, float], element: Union[int, float], size: int) → float

Incremental operation.

get() → float

Get method.

class frouros.utils.stats.CircularMean(size: int)

Circular mean class.

Parameters:

size (int) – size of the circular mean

update(value: Union[int, float]) → None

Update the mean value sequentially.

Parameters:

value (int) – value to use to update the mean

Raises:

TypeError – Type error exception

class frouros.utils.stats.EWMA(alpha: float)

EWMA (Exponential Weighted Moving Average) class.

Parameters:

alpha (float) – alpha value

property alpha: float

Alpha property.

Returns:

alpha value

Return type:

float

property mean: float

Mean property.

Returns:

mean value

Return type:

float

update(value: Union[int, float]) → None

Update the mean value sequentially.

Parameters:

value (int) – value to use to update the mean

Raises:

TypeError – Type error exception

get() → float

Get method.

frouros.utils.stats.permutation(X: ndarray, Y: ndarray, statistic: Callable, statistical_args: Dict[str, Any], num_permutations: int, num_jobs: int, random_state: Optional[int] = None, verbose: bool = False) → List[float]

Permutation method.

Parameters:

• X (numpy.ndarray) – reference data

• Y (numpy.ndarray) – test data

• statistic (Callable) – statistic to use

• statistical_args (Dict[str, Any]) – args to pass to statistic method

• num_permutations (int) – number of permutations to use

• num_jobs (int) – number of jobs to use

• random_state (Optional[int]) – random state value, defaults to None

• verbose (bool) – verbose flag, defaults to False

Returns:

permuted statistics

Return type:

List[float]